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. 마이클 오헤어(1952년생, Chicago, Illinois, USA) 는 배우로, 대표작으로 Babylon 5: The Gathering, By a Thread, The Promise가 있으며, 그 외에도 로 앤 오더, 전함 바빌론, L.A. Law, Tales from the Darkside, Kate & Allie, T. J. Hooker, The Equalizer, Trapper John, M.D., The Adams Chronicles, C.H.U.D., 엠브런스, Babylon 5: In the Beginning 등 다양한 작품에 출연했다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 1998년 Babylon 5: In the Beginning에서 Lt. Cmdr. Jeffrey Sinclair (archive footage) 역을 맡았다. 1994년 전함 바빌론에서 Ambassador Jeffrey Sinclair 역을 맡았다. 1994년 전함 바빌론에서 Jeffrey Sinclair 역을 맡았다.