Having cut his teeth on Broadway stages in the early 1950s, Stevens transitioned from the boards to the screen, where his film credits include a portrayal of Colonel Charles R. Codman in the acclaimed war epic Patton, as well as roles in Exodus, Advise and Consent and Marlowe, and a turn as Mendez, a mutant underground leader, in Battle for the Planet of the Apes. His television debut arrived on P…