Guru Dutt had spotted Waheeda Rehman in a Telugu movie and cast her in "Pyaasa" (1957), but gave her a key supporting role in "C.I.D." to prepare her for "Pyaasa". The choreography of this film was done by Zohra Sehgal. The costumes were credited to a debutant, Bhanumati, who is better known as Bhanu Athaiya. Johnny Walker and Kum Kum as his girlfriend offer a comedy track and social commentary on the honest criminals trying to get by. They interact with Bombay in a way that is more direct and hands-on than the others, and they know the ins-and-outs of the cops and robbers' games. Mehmood was the most effective when he had no lines. He looked the part, but sounds a little too hammy. Anyway, the boss takes no chances and has Sher Singh bumped off, and frames Shekhar for both murders. Produced by Guru Dutt and directed by Raj Khosla, "C.I.D." is an entertaining and engaging thriller. Pitting a suave Dev Anand against a shadowy criminal mastermind, the story is told with tempo and light and shade. Add in the lush O.P Nayyar songs, a young and minxy Waheeda Rehman dancing to choreography by Zohra Sehgal, Johnny Walker actually being funny, and there is so much to love. There are a few points of judicial process that seem unlikely, but not enough to detract from the overall enjoyment of an accomplished yarn.