
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.

Law & Order
TV • 1990

Law & Order
TV • 1990

L.A. Law
TV • 1986

Babylon 5
TV • 1994

Babylon 5
TV • 1994

The Equalizer
TV • 1985

T. J. Hooker
TV • 1982

Trapper John, M.D.
TV • 1979

Tales from the Darkside
TV • 1984

Kate & Allie
TV • 1984

C.H.U.D.
MOVIE • 1984

Last Exit to Brooklyn
MOVIE • 1989

The Ambulance
MOVIE • 1990

The Pursuit of D.B. Cooper
MOVIE • 1981

Babylon 5: In the Beginning
MOVIE • 1998

Babylon 5: The Gathering
MOVIE • 1993

The Promise
MOVIE • 1979

Fly Away Home
MOVIE • 1981