Climax!, later known as Climax Mystery Theater is an American anthology series that aired on CBS from 1954 to 1958.

The series was hosted by William Lundigan and later co-hosted by Mary Costa.  It was one of the few CBS programs of that era to be broadcast in color (using the massive TK-40A color cameras pioneered and manufactured by RCA, and used primarily by CBS’ arch-rival network, NBC).  Many of the episodes were performed and broadcast live, and although the series was transmitted in color, only black-and-white kinescope copies of some episodes survive to the present day.

In 1954, an episode of Climax! featured Ian Fleming’s secret agent James Bond in a television adaptation of Casino Royale.  It starred Barry Nelson as American secret agent “Jimmy Bond” and Peter Lorre as the villain Le Chiffre.  This was the first screen adaptation of a James Bond novel, made before Eon Productions acquired the Bond film rights.