Cmdr. Jeffrey Sinclair is a fictional character portrayed by Michael O'Hare in the TV series Babylon 5.
In the first episode they appeared in, titled Babylon 5: The Gathering (season 1), they were 40 years old.
They appear in 26 episodes out of a total of 110 aired and have accumulated 1116 positive votes.
The character of Cmdr. Jeffrey Sinclair is mainly associated with Michael Garibaldi, Cmdr. Susan Ivanova and Delenn.
Episodes26
Babylon 5: The Gathering
episode S1.E0 february 1993The opening of a crucial space station is put in jeopardy when the commanding officer is accused of the attempted murder of a diplomat.
Midnight on the Firing Line
episode S1.E1 january 1994The Narn attack a Centauri colony, while Raiders attack transport ships. Talia Winters arrives at the station.
Soul Hunter
episode S1.E2 february 1994A mysterious alien who steals the souls of the living arrives on the station, putting Delenn's life in danger.
Born to the Purple
episode S1.E3 february 1994Londo falls for a beautiful slave, whose owner wants to steal sensitive information. Garibaldi discovers that someone is using a restricted communications channel.
Infection
episode S1.E4 february 1994A living weapon wreaks havoc on the station.
The Parliament of Dreams
episode S1.E5 february 1994A week long cultural festival is takes place on board the station. Catherine Sakai, Sinclair's old girlfriend, arrives on the station and G'Kar receives a death threat.
Mind War
episode S1.E6 march 1994The Psi Cops arrive at the station to capture Talia's old Psi Corps instructor. Catherine is warned not to survey a sector of space by G'Kar.
The War Prayer
episode S1.E7 march 1994A pro-Earth group attacks a Minbari poet. Two Centauri lovers seek Londo's help.
And the Sky Full of Stars
episode S1.E8 march 1994Sinclair is kidnapped by two men who want to know what happened to him when he disappeared in the final battle of the Earth-Minbari War, something that even Sinclair does not know.
Deathwalker
episode S1.E9 april 1994A war criminal scientist who is the last of the notorious Dilgars is discovered on Babylon 5 bearing an extraordinary medication that all the powers want.
Believers
episode S1.E10 april 1994An alien family refuses surgery to save their dying child.
Survivors
episode S1.E11 may 1994Garibaldi is blamed for an accident aboard B5, leading to his return to the bottle.
By Any Means Necessary
episode S1.E12 may 1994While the station's dock workers stage an illegal strike, G'Kar tries to hold a Narn religious ceremony, but Londo holds the plant he needs and won't relinquish it.
Signs and Portents
episode S1.E13 may 1994Londo obtains a priceless Centauri artifact and a stranger visits each alien ambassador asking only one question.
TKO
episode S1.E14 may 1994A disgraced boxer comes to Babylon 5 to compete in the Mutai, an alien fighting match. Meanwhile, an old friend visits Ivanova so that she can mourn the loss of her father.
Grail
episode S1.E15 july 1994A man searching for the Holy Grail arrives. Ambassador Kosh may be behind a string of attacks on the station.
Eyes
episode S1.E16 july 1994Colonel Ari Ben Zayn of Earthforce Internal Affairs investigates Sinclair and his command staff for recent station actions.
Legacies
episode S1.E17 july 1994A Minbari military leader's dead body disappears on the station.
A Voice in the Wilderness: Part 1
episode S1.E18 july 1994Delenn's old friend and mentor Draal arrives on the station at the same time that an extinct civilization is found on the planet that Babylon 5 orbits. A revolt against the Earth Alliance breaks out on Mars.
A Voice in the Wilderness: Part 2
episode S1.E19 august 1994Earthforce Captain Ellis Pierce and an alien race both lay claim to Epsilon III, the planet which Babylon 5 orbits. The revolt on Mars continues, leading to many casualties.
Babylon Squared
episode S1.E20 august 1994Babylon 5's immediate predecessor, Babylon 4, suddenly reappears after mysteriously vanishing four years earlier.
The Quality of Mercy
episode S1.E21 august 1994Talia must enter the mind of a convicted murderer while Dr. Franklin goes to Downbelow to investigate a doctor who apparently is 'magically' healing people.
Chrysalis
episode S1.E22 october 1994Garibaldi investigates a death on the station which leads him to a terrible discovery.
The Coming of Shadows
episode S2.E9 february 1995The Centauri emperor visits the station, leading G'Kar to attempt to assassinate him. Lord Refa and Londo conspire to expand their power on Centauri Prime.
War Without End: Part One
episode S3.E16 may 1996Jeffrey Sinclair returns to Babylon 5 with a mission: to take Babylon 4 back in time to where it is most needed.
War Without End: Part Two
episode S3.E17 may 1996The mission to send Babylon 4 where it's needed continues. Sinclair's destiny is revealed. Sheridan sees what will happen to Centauri Prime in the future. Zathras explains who the "One" is.
- Babylon 5: The Gathering
- Midnight on the Firing Line
- Soul Hunter
- Born to the Purple
- Infection
- The Parliament of Dreams
- Mind War
- The War Prayer
- And the Sky Full of Stars
- Deathwalker
- Believers
- Survivors
- By Any Means Necessary
- Signs and Portents
- TKO
- Grail
- Eyes
- Legacies
- A Voice in the Wilderness: Part 1
- A Voice in the Wilderness: Part 2
- Babylon Squared
- The Quality of Mercy
- Chrysalis
- The Coming of Shadows
- War Without End: Part One
- War Without End: Part Two
Best moments10
- Jeffrey Sinclair returns to Babylon 5 with a mission: to take Babylon 4 back in time to where it is most needed.
- Earthforce Captain Ellis Pierce and an alien race both lay claim to Epsilon III, the planet which Babylon 5 orbits. The revolt on Mars continues, leading to many casualties.
- A pro-Earth group attacks a Minbari poet. Two Centauri lovers seek Londo's help.
- The mission to send Babylon 4 where it's needed continues. Sinclair's destiny is revealed. Sheridan sees what will happen to Centauri Prime in the future. Zathras explains who the "One" is.
- Londo falls for a beautiful slave, whose owner wants to steal sensitive information. Garibaldi discovers that someone is using a restricted communications channel.
- A man searching for the Holy Grail arrives. Ambassador Kosh may be behind a string of attacks on the station.
- The Narn attack a Centauri colony, while Raiders attack transport ships. Talia Winters arrives at the station.
- Garibaldi is blamed for an accident aboard B5, leading to his return to the bottle.
- A war criminal scientist who is the last of the notorious Dilgars is discovered on Babylon 5 bearing an extraordinary medication that all the powers want.
- Sinclair is kidnapped by two men who want to know what happened to him when he disappeared in the final battle of the Earth-Minbari War, something that even Sinclair does not know.
- War Without End: Part One
- A Voice in the Wilderness: Part 2
- The War Prayer
- War Without End: Part Two
- Born to the Purple
- Grail
- Midnight on the Firing Line
- Survivors
- Deathwalker
- And the Sky Full of Stars