|Directed by||George Marshall|
|Produced by||Tony Owen|
Adrian D. Worker
|Written by||Richard English|
|Based on||The Mark of the Leopard|
by James Eastwood
|Music by||Humphrey Searle|
|Edited by||Ernest Walter|
|Distributed by||Columbia Pictures|
|June 1, 1957|
Matt Campbell (Cornel Wilde) arrives in Kenya, where his brother George is reported missing. A man named Ralph Hoyt (Leo Genn) tells him that George has been killed by members of the "Leopard Men" cult.
Matt is introduced to Hoyt's niece, Ann Wilson (Donna Reed), an anthropologist, who is puzzled by Matt's reluctance to go to Mombasa for his brother's funeral. Matt also meets big-game hunter Gil Rossi (Christopher Lee), who was helping George search for a valuable uranium mine. Hoyt claims the mine doesn't exist.
Another business partner, Elliott Hastings (Ron Randell), claims that George's body has been cremated but he did find a map. An expedition beyond Mombasa is formed, guided by Ketimi (Dan Jackson) and other local tribesmen. A shared experience with a charge of hippos brings Matt and Ann closer together, while Gil is nearly killed by a crocodile before it is shot by Hastings.
Tribesmen wearing leopard disguises attack Hastings that night. Ketimi is then killed by a poison dart, causing the other tribesmen to leave. Locating a shaft to the mine, Elliot, Matt and Ann descend into it. She discovers to her horror that Hoyt, her uncle, has murdered Gil with a blow gun. Hoyt confesses to killing Ketimi and paying other natives to disguise themselves as the mythical Leopard Men.
Matt and Ann are about to become the next victims, but Ketimi's fellow tribesmen reappear and take their revenge.
The film was made by Hemisphere, an off shoot of Columbia under the supervision of Mike Frankovich which shot films outside the US. They co produced with Todon, the production company of agent-turned producer Tony Owens and his wife, actor Donna Reed.
The film was to star Aldo Ray but he turned down the role. As a result Columbia put him on suspension. Cornel Wilde replaced him in December 1955. Leo Genn signed to do the film after pulling out of Run for the Sun.
- BEYOND MOMBASA Monthly Film Bulletin; London Vol. 23, Iss. 264, (Jan 1, 1956): 139.
- FILM FILE ON A BUSY EXPATRIATE: Quick on the Draw Productions Galore Amicable Parting Prime Promoter By STEPHEN WATTS LONDON. New York Times 11 Mar 1956: 134.
- A TOWN CALLED HOLLYWOOD: Studio Has 4 McGowans, Not to Mention a Megowan Scheuer, Philip K. Los Angeles Times 26 Aug 1956: D2.
- Jay Robinson, Lee Grant Named for 'Storm Fear;' Holt Plans 'Texas Lady' Schallert, Edwin. Los Angeles Times 30 Mar 1955: B11.
- Todon Doing 6th Picture Los Angeles Times 5 Feb 1956: D3.
- ABBOTT, COSTELLO SLATE NEW MOVIE: Comedy Team Will Star in 'Dance With Me, Henry' for United Artists By THOMAS M. PRYORSpecial to The New York Times. New York Times 22 Dec 1955: 20.
- PLAY BY WILDER TO BECOME FILM: Paramount Will Screen 'The Matchmaker,' Stage Hit-- 'Chalk Garden' Eyed 'Best Things in Life' By THOMAS M. PRYOR New York Times 17 Feb 1956: 12.
- Louella Parsons: Leigh Snowden Ends Plan for Christmas Tour The Washington Post and Times Herald 10 Dec 1955: 14.
- MARILYN MONROE WINS PACT FIGHT: Star, Fox Agree to 7-Year Non-Exclusive Contract for Total of 4 Pictures New Film for Doris Day Switches at Fox Of Local Origin By THOMAS M. PRYOR New York Times 5 Jan 1956: 27.
- Star Ends Safari: With Elephants, Monkeys By Melita Knowles Staff Correspondent of The Christian Science Monitor. The Christian Science Monitor 1 May 1956: 14.