
Acting
Robert Michael O'Hare Jr. (May 6, 1952 – September 28, 2012) was an American actor who performed on stage and television. He was best known for playing Commander Jeffrey Sinclair in the science fiction television series Babylon 5, a role he left due to serious mental health issues. Born in Chicago, Illinois. He attended Chicago's Mendel Catholic Preparatory High School, then studied at Harvard University, where he majored in English literature. He studied at the Juilliard School of Drama, and with Sanford Meisner.

Babylon 5: In the Beginning
as Lt. Cmdr. Jeffrey Sinclair (archive footage)

Babylon 5: The Gathering
as Cmdr. Jeffrey Sinclair

By a Thread
as Quentin Springer

The Ambulance
as Hal

Last Exit to Brooklyn
as Riot Police Officer
Short-Term Bonds
as Bowers
A Case of Deadly Force
as Joe Miller

C.H.U.D.
as Fuller

The Pursuit of D.B. Cooper
as Car Owner

Fly Away Home

Babylon 5
as Jeffrey Sinclair · 22 ep.

Law & Order
as Mr. Tobin · 1 ep.

L.A. Law
as Michael Lattimer · 1 ep.

The Equalizer
as Alex · 1 ep.

Tales from the Darkside
as Jimmy · 1 ep.

Kate & Allie
1 ep.

T. J. Hooker
as Cal Jastrow · 1 ep.

Trapper John, M.D.
1 ep.

The Adams Chronicles
as Richard Cranch · 6 ep.
Last Exit to Brooklyn
1989