Was a friend of Walter Cronkite for over 70 years since they were both students at the University of Texas in Austin. Wallach was acknowledged at the Walter Cronkite memorial tribute at Lincoln Center and was in the audience.
Was almost killed during the train scene in The Good, the Bad and the Ugly (1966). He was asked by Sergio Leone to do the scene again, and he then replied: "I'll never do that again!"
Was named as "King of Brooklyn" at the Welcome Back to Brooklyn Festival in 1998. His wife Anne Jackson was named "Queen of Brooklyn" at the same festival.
Was trained at The Neighborhood Playhouse in New York.
While attending The University of Texas he acted in many student plays and in one he costarred with Walter Cronkite.