Fathom is a 1967 British spy comedy film directed by Leslie H. Martinson, starring Raquel Welch and Anthony Franciosa.

The film was based on Larry Forrester's second Fathom novel Fathom Heavensent, then in the draft stage but never published. His first was 1967's A Girl Called Fathom.

This was one of three 1967 20th Century Fox films about female spies, the others being Doris Day's Caprice and Andrea Dromm's Come Spy with Me. Writer Lorenzo Semple said "It could have been very good. It's so confused. I watched it a couple of times, and I really didn’t know what was gonna happen! I didn't know who done it or what they'd done!"