Richard Maibaum episode "The Medal" for "Combat!" (1963) then wrote "From Russia with Love" (1963), sharing credit with Harwood. Maibaum worked on "Goldfinger" (1964), on which Paul Dehn also did work. He was one of several writers on "Thunderball" (1965). "You Only Live Twice" (1967) was the first Bond film on which Maibaum was not credited as a writer, the producers using Roald Dahl. Albert Broccoli wanted to produce a non-Bond movie, "Chitty Chitty Bang Bang" (1968) and Maibaum did some work on the script. Maibum received sole script credit for "On Her Majesty's Secret Service" (1969), starring George Lazenby. He did
Chitty Bang Bang the sound of an idling aeroplane engine or from a salacious World War I song. Chitty 1 was a chain-driven customised Mercedes chassis containing a 23-litre 6-cylinder Maybach aero-engine. It won two races at its debut at Brooklands in 1921, coming second to another Zborowski car in a sprint race at the same event. "Chitty 1" was fitted with four seats and a crude, oversized exhaust pipe, in order to misguide the handicappers and spectators. Its top speed on the day was 100.75 miles per hour (162.14 km/h). For its next outing, "Chitty 1" was refitted, as a two-seater with