The Cuckoo Waltz is a British television sitcom produced by Granada Television for the ITV network between 1975 and 1980. It was written by Geoffrey Lancashire, and produced and directed by Bill Gilmour. The series, which was set in 1970s and early 1980s Manchester, dealt with the comic complications that ensue when impoverished newly-weds Chris and Fliss Hawthorne (David Roper and Diane Keen) take in lodger Gavin Rumsey (Lewis Collins) to ease their financial problems. Collins left after three series and was replaced by Ian Saynor as Adrian Lockett in the fourth series.