The NBC Mystery Movie was an "umbrella title" for one of many mystery series shown on a rotating basis in the same time slot on Sunday nights on NBC. The original three series featured were Columbo (1971), McMillan & Wife (1971) and McCloud (1970). Later, several other (often short-lived) series were added to the rotation including Hec Ramsey (1972), Amy Prentiss (1974), McCoy (1975), Quincy M.E. (1976), and _"Lanigan's Rabbi" (1977)_. The "wheel" concept proved so popular that NBC started a second night on Wednesdays, featuring Banacek (1972), Cool Million (1972), Madigan (1972), Faraday and Company (1973), Tenafly (1973), and _"The Snoop Sisters" (1973)_. Low ratings forced NBC to move the second wheel to Tuesdays, but it was still canceled in 1974. The Sunday wheel ran its course in 1978.