Possible Clues:

• Plato portrayer in 'Rebel Without a Cause'
• Dean's 'Rebel Without a Cause' co-star
• Dean's pal in ''Rebel Without a Cause''
• Uriah in ''The Greatest Story Ever Told''
• "Giant" actor Sal
• He played the ape Dr. Milo in 'Escape From the Planet of the Apes'
• 'The Gene Krupa Story' title role player
• 1950s-'60s actor known as the Switchblade Kid
• Cinematic Sal