Richard Carlson vs. Hugh Marlowe: Can you tell them apart?

Looked to the skies and saw alien spacecraft in It Came from Outer Space (1953)	Richard Carlson	Answer
Looked to the skies and saw alien spacecraft (animated by Ray Harryhausen) in Earth vs. the Flying Saucers (1956)	Hugh Marlowe	Answer
Helped lasso a dinosaur (animated by Ray Harryhausen) in The Valley of Gwangi (1969)	Richard Carlson	Answer
Was a time-travelling astronaut battling mutants in World Without End (1956)	Hugh Marlowe	Answer
Starred in and directed the space-travel sci-fi film Riders to the Stars (1954)	Richard Carlson	Answer
Played Patricia Neal's meddling boyfriend in The Day the Earth Stood Still (1951)	Hugh Marlowe	Answer
Played Susan Hayward's husband in Garden of Evil (1954)	Hugh Marlowe	Answer
Held Susan Hayward captive in Rawhide (1951)	Hugh Marlowe	Answer
Hunted a prehistoric gill-man in Creature from the Black Lagoon (1954)	Richard Carlson	Answer
Was directed by Curt Siodmak in The Magnetic Monster (1953)	Richard Carlson	Answer
Could have been played by Phil Hartman	Phil could have played them both!	Answer