Theodore Carroll Marcuse (August 2, 1920 – November 29, 1967[1]) was an American character actor who appeared frequently on television in the 1950s and 1960s, often portraying villains.

[citation needed] After growing up in San Francisco, he studied dramatic arts at Stanford University and was active in theatrical productions there.

[citation needed] Marcuse trained under Guthrie McClintic in his theatre company, along with Charlton Heston, and appeared on Broadway with Katharine Cornell, Maurice Evans and others.

[2] On television he appeared on many series, including The Beverly Hillbillies, Voyage to the Bottom of the Sea, The Wild Wild West, Have Gun – Will Travel, Bonanza, Hogan's Heroes (the 1967 episode "The Hostage", as General von Heiner), Batman, Star Trek (episode "Catspaw"), The Time Tunnel, I Spy, The Monkees, Perry Mason, Peter Gunn, The Untouchables, The Twilight Zone episodes "The Trade-Ins" and "To Serve Man", and The Man from U.N.C.L.E.

His film career included roles in The Two Little Bears (1961), Hitler (1962, as Julius Streicher), A Tiger Walks (1964), The Cincinnati Kid (1965), Mara of the Wilderness (1965), Harum Scarum (1965), The Last of the Secret Agents?