Episode 1 - Flash Forward - is actually a scene from Episode 20. Therefore in listing the characters and the episode in which they are introduced, I am skipping over Episode 1. Chronologically, Episode 2 is the first episode in Star Trek Hunter.

Character: Captain Geordie LaForge (Geordie)
Human Ethnicity: Somali
Additional Species: N/A
Hometown/Homeworld: Mogadishu, Somalia, Earth
Introduced: Episode 2.1
Age when introduced: 44
Role: Captain, U.S.S. Enterprise

Character: 2nd Lieutenant Kenneth Dolphin (Kenny)
Human Ethnicity: German American
Additional Species: N/A
Hometown/Homeworld: Providence, Rhode Island, Earth
Introduced: Episode 2.1
Age when introduced: 51
Role: Flight Operations Shift Leader, U.S.S. Enterprise

Character:                      At Large Apellate Justice, Captain Minerva Irons (Minerva)
Human Ethnicity:            Chinese
Additional Species:        Vulcan, Trill, Betazoid
Hometown/Homeworld: Ba Sing Se, Cun Ling
Introduced: Episode       2.2
Age when introduced:    158
Role:                               Captain of the U.S.S. Hunter, Matriarch of the Irons Family, At Large Appellate Justice

Character:                      Commander David Pepper (Pep)
Human Ethnicity:            African American
Additional Species:        Orion, Andorian
Hometown/Homeworld: Laikan, Andoria
Introduced: Episode       2.2
Age when introduced:    45
Role:                               Chief Executive Officer, U.S.S. Hunter

Character:                      Lieutenant Commander Mlady
Human Ethnicity:            N/A
Additional Species:        N/A
Hometown/Homeworld: Undisclosed
Introduced: Episode       2.2
Age when introduced:    Unknown
Role:                               Chief Operations Officer, U.S.S. Hunter

Character:                      Lieutenant Sarekson Carrera (Dr. Carrera)
Human Ethnicity:            Chilean
Additional Species:        Vulcan
Hometown/Homeworld: Pichilemu, Chile, Earth
Introduced: Episode       2.2
Age when introduced:    23
Role:                               Director of Engineering, U.S.S. Hunter

Character:                      Investigator Buttans Ngumbo (Ngumbo)
Human Ethnicity:            Maasai
Additional Species:        Bajoran
Hometown/Homeworld: Hathan, Bajor
Introduced: Episode       2.3
Age when introduced:    28
Role:                               Civilian Investigator contracted to the U.S.S. Hunter

Character:                      Investigator Lenhart Shran (Lenny)
Human Ethnicity:            Jewish American
Additional Species:         Andorian
Hometown/Homeworld: New York City, New York, Earth
Introduced: Episode       2.3
Age when introduced:    68
Role:                               Civilian Investigator contracted to the U.S.S. Hunter

Character:                      2nd Lieutenant Tauk (Tauk)
Human Ethnicity:            N/A
Additional Species:        Ferengi
Hometown/Homeworld: Dos, Ferenginar
Introduced: Episode       2.3
Age when introduced:    23
Role:                               Assistant Director of Ground Operations, U.S.S. Hunter

Character:                      Governor Emory Ivonivic (Emory)
Human Ethnicity:            Serbian
Additional Species:        N/A
Hometown/Homeworld: Pilgrim’s Landing, Colony of New Hope
Introduced: Episode       2.4
Age when introduced:    65
Role:                               Planetary Governor of the Colony of New Hope

Character:                      Lieutenant T’Lok Smith (T’Lok)
Human Ethnicity:            Hawaiian
Additional Species:        Vulcan
Hometown/Homeworld: Kawai Island, Hawaii, Earth
Introduced: Episode       2.5
Age when introduced:    27
Role:                               Director of Ground Operations, U.S.S. Hunter

Character:                      Ensign T’Lon (T’Lon)
Human Ethnicity:            N/A
Additional Species:        Vulcan
Hometown/Homeworld: Kawai Island, Hawaii, Earth
Introduced: Episode       2.5
Age when introduced:    25
Role:                               Tactical Operation Squad Leader, U.S.S. Hunter

Character:                      Tactical Specialist Belo Rys (Rys)
Human Ethnicity:            N/A
Additional Species:        Bajoran, Cardassian
Hometown/Homeworld: Cardiassia Imperial Outpost 19
Introduced: Episode       2.5
Age when introduced:    19
Role:                               Tactical Squad Member, U.S.S. Hunter

Character:                      Tactical Specialist Jarrong (Jarrong)
Human Ethnicity:            N/A
Additional Species:        Cardassian, Bajoran
Hometown/Homeworld: Cardiassia Imperial Outpost 19
Introduced: Episode       2.5
Age when introduced:    18
Role:                               Tactical Squad Member, U.S.S. Hunter

Character:                      Tactical Specialist Belo Garr (Garr)
Human Ethnicity:            N/A
Additional Species:        Bajoran, Cardassian
Hometown/Homeworld: Cardiassia Imperial Outpost 19
Introduced: Episode       2.5
Age when introduced:    17
Role:                               Tactical Squad Member, U.S.S. Hunter

Character:                      Tactical Specialist Belo Cantys (Cantys)
Human Ethnicity:            N/A
Additional Species:        Bajoran, Cardassian
Hometown/Homeworld: Cardiassia Imperial Outpost 19
Introduced: Episode       2.5
Age when introduced:    16
Role:                               Tactical Squad Member, U.S.S. Hunter

Character:                      Lieutenant Kenneth Dolphin (Kenny)
Human Ethnicity:            German American
Additional Species:        N/A
Hometown/Homeworld: Providence, Rhode Island, Earth
Introduced: Episode       2.6
Age when introduced:    51
Role:                               Director of Flight Operations, U.S.S. Hunter

Character:                      2nd Lieutenant Gaia Gamor (Gaia)
Human Ethnicity:            Congolese
Additional Species:        N/A
Hometown/Homeworld: Ingende, Congo, Earth
Introduced: Episode       2.6
Age when introduced:    25
Role:                               Assistant Director of Flight Operations, U.S.S. Hunter

Character:                      The U.S.S. Hunter (Hunter)
Human Ethnicity:            Mexican (hologram)
Additional Species:        N/A
Hometown/Homeworld: New Eden, Mars
Introduced: Episode       2.6
Age when introduced:    13
Role:                               Interactive Holographic Avatar, U.S.S. Hunter

Character:                      Lieutenant Allen Mitchell
Human Ethnicity:            English American
Additional Species:        N/A
Hometown/Homeworld: Virtue, Colony of New Hope
Introduced: Episode       2.6
Age when introduced:    44
Role:                               Director of Planetary Operations, The Colony of New Hope

Character:                      Chief Flight Specialist Dewayne Guth (Dewayne)
Human Ethnicity:            African American
Additional Species:        Trill
Hometown/Homeworld: Wakanda, Cun Ling
Introduced: Episode       2.9
Age when introduced:    37
Role:                               Pilot, U.S.S. Hunter

Character:                      Ensign Sun Ho Hui (Hui)
Human Ethnicity:            Vietnamese
Additional Species:        Vulcan, Bajoran
Hometown/Homeworld: Hanoi, Vietnam, Earth
Introduced: Episode       2.9
Age when introduced:    23
Role:                               Team Leader, Flight Engineering, U.S.S. Hunter

Character:                      Flight Specialist Winnifried Salazaar (Winnie)
Human Ethnicity:            Puerto Rican
Additional Species:         Betazoid
Hometown/Homeworld: New York City, New York, Earth
Introduced: Episode       2.10
Age when introduced:    24
Role:                               Pilot, U.S.S. Hunter

Character:                      Lieutenant Commander Tali Shae (Tali)
Human Ethnicity:           N/A
Additional Species:        Andorian
Hometown/Homeworld: Laikan, Andoria
Introduced: Episode       2.12
Age when introduced:    58
Role:                               Medical Director, U.S.S. Hunter

Character:                      Ensign Ethan Phillips (Ethan)
Human Ethnicity:            African American
Additional Species:        Vulcan
Hometown/Homeworld: Rus, Vulcan
Introduced: Episode       2.13
Age when introduced:    22
Role:                               Flight Team Leader, U.S.S. Hunter

Character:                      Flight Specialist Dih Terri (Terri)
Human Ethnicity:           N/A
Additional Species:        Trill
Hometown/Homeworld: Trantor, Cun Ling
Introduced: Episode       3.1
Age when introduced:    24
Role:                               Pilot, U.S.S. Hunter

Character:                      Flight Specialist Joey Chin (Joey)
Human Ethnicity:           Chinese American
Additional Species:        Vulcan
Hometown/Homeworld: Ba Sing Se, Cun Ling
Introduced: Episode       3.1
Age when introduced:    20
Role:                               Pilot, U.S.S. Hunter

Character:                      Navigator Johanna Imex (Jo Jo)
Human Ethnicity:           Tutsi
Additional Species:        Vulcan
Hometown/Homeworld: Mbuye, Rwanda, Earth
Introduced: Episode       3.1
Age when introduced:    35
Role:                               Navigator, U.S.S. Hunter

Character:                      Navigator Eli Strahl (Eli)
Human Ethnicity:           N/A
Additional Species:        Betazoid, Trill
Hometown/Homeworld: Eden, Cun Ling
Introduced: Episode       3.1
Age when introduced:    21
Role:                               Navigator, U.S.S. Hunter

Character:                      Lieutenant Lezra Thune (Lezra)
Human Ethnicity:            German American
Additional Species:        Trill
Hometown/Homeworld: Duluth, Minnesota, Earth
Introduced: Episode       3.2
Age when introduced:    28
Role:                               Surgery Team Leader, U.S.S. Challenger, Murder Victim

Character:                     Flight Engineer John Thune (John)
Human Ethnicity:           African American
Additional Species:       N/A
Hometown/Homeworld: Eden, Cun Ling
Introduced: Episode       3.2
Age when introduced:    31
Role:                               Flight Engineer, U.S.S. Challenger, Murder Victim

Character:                      Captain DeForest Summers (Forest)
Human Ethnicity:            English American
Additional Species:        NA
Hometown/Homeworld: Nashville, Tennesee, Earth
Introduced: Episode       3.4
Age when introduced:    49
Role:                               Captain, U.S.S. Challenger

Character:                      Mavar Irons (Mavar)
Human Ethnicity:           N/A
Additional Species:        Vulcan
Hometown/Homeworld: Main Island, Ocean
Introduced: Episode       3.6
Age when introduced:    198
Role:                               Farmer

Character:                      T’Mov Irons (T’Mov)
Human Ethnicity:            N/A
Additional Species:        Vulcan
Hometown/Homeworld: Vulcana Regar, Vulcan
Introduced: Episode       3.6
Age when introduced:    53
Role:                               Recreation Facility Administrator

Character:                      Rear Admiral Samantha Burton (Samantha)
Human Ethnicity:            African American
Additional Species:        N/A
Hometown/Homeworld: Atlanta, Georgia, Earth
Introduced: Episode       3.7
Age when introduced:    59
Role:                               Station Commander, Starbase Eleven

Character:                      Flight Engineer Thomas Hobbs (Tommy)
Human Ethnicity:           Scottish
Additional Species:        Vulcan
Hometown/Homeworld: Trantor, Cun Ling
Introduced: Episode       3.8
Age when introduced:    56
Role:                               Flight Engineer, U.S.S. Hunter

Character:                      2nd Lieutenant Casper Yates (Casper)
Human Ethnicity:           Welsh
Additional Species:        N/A
Hometown/Homeworld: Cardiff, Wales, Earth
Introduced: Episode       3.8
Age when introduced:    22
Role:                               Watch Officer, Starbase Eleven

Character:                     Lieutenant Commander Holly Nash (Holly)
Human Ethnicity:           Welsh
Additional Species:        N/A
Hometown/Homeworld: Trantor, Cun Ling
Introduced: Episode       3.8
Age when introduced:    27
Role:                               Director of Flight Operations, Starbase Eleven

Character:                       Tamar Irons (Tamar)
Human Ethnicity:             Chinese
Additional Species:         Vulcan, Betazoid, Trill
Hometown/Homeworld:  Main Island, Ocean
Introduced: Episode        3.10
Age when introduced:     114
Role:                                Planetary Administrator, Ocean

Character:                      China Irons (China)
Human Ethnicity:            Chinese
Additional Species:         Vulcan, Betazoid, Trill
Hometown/Homeworld:  Main Island, Ocean
Introduced: Episode       3.10
Age when introduced:    101
Role:                               Cultural Anthropologist

Character:                      Dr. Kim (TMH)
Human Ethnicity:            Korean (Hologram)
Additional Species:         N/A
Hometown/Homeworld:  New Eden, Mars
Introduced: Episode        4.2
Age when introduced:     3
Role:                                Tactical Medical Hologram, U.S.S. Hunter

Character:                      2nd Lieutenant Moon Sun Salek (Salek)
Human Ethnicity:            Korean
Additional Species:        Vulcan
Hometown/Homeworld:  New Eden, Mars
Introduced: Episode       4.5
Age when introduced:    41
Role:                               Assistant Director of Engineering, U.S.S. Hunter

Character:                      Flight Engineer Tomos (Tomos)
Human Ethnicity:           N/A
Additional Species:        Vulcan
Hometown/Homeworld: Sanctuary of the Waterbirds, Cophus II
Introduced: Episode       4.5
Age when introduced:    100
Role:                               Flight Engineer, U.S.S. Hunter

Character:                      Midshipman Tolon Reeves (Reeves)
Human Ethnicity:            Indian
Additional Species:        Bajoran
Hometown/Homeworld: Bangalore, India, Earth
Introduced: Episode       4.6
Age when introduced:    46
Role:                               Medical Forensic Investigator, U.S.S. Hunter

Character:                      2nd Lieutenant Jazz Sam Sinder (Sam)
Human Ethnicity:           N/A
Additional Species:        Bajoran
Hometown/Homeworld:  Ilvia, Bajor
Introduced: Episode       4.7
Age when introduced:    37
Role:                               Assistant Medical Director, U.S.S. Hunter

Character:                      Dr. Raj (EMH)
Human Ethnicity:            Indian (Hologram)
Additional Species:         N/A
Hometown/Homeworld:  New Eden, Mars
Introduced: Episode       4.7
Age when introduced:    2
Role:                               Emergency Medical Hologram, U.S.S. Hunter

Character:                      Midshipman Sif (Sif)
Human Ethnicity:           N/A
Additional Species:        Trill
Hometown/Homeworld: Numinor, Cun Ling
Introduced: Episode       4.7
Age when introduced:    31
Role:                               Medical Forenic Investigator, U.S.S. Hunter

Character:                      Ensign Chrissiana Trei (Chrissiana)
Human Ethnicity:           N/A
Additional Species:        Trill
Hometown/Homeworld: Horizon, Trillus Prime
Introduced: Episode       4.7
Age when introduced:    34
Role:                               Navigator, U.S.S. Hunter