[Borges]

He was apparently an Orthodox Jew. Lived in Monsey...

[Buckeye McFrog]

He was actually shown the door at Mission:Impossible because he refused to work the Sabbath and it was messing with the shooting schedule.

When he wandered down the hall at Desilu and tried to convince his fellow Jews, Bill Shatner and Leonard Nimoy, that they too should not work the Sabbath, it was too much for the studio.

[Bubba Ho-Tep]

There was a time in the Actors Studio when he was considered to be more likely to become a major actor than his classmate Brando.