The Avengers.S04E09.The Hour That Never Was

After crashing their car, Steed and Emma visit an airfield and find a baffling mystery of stopped clocks, dead milkmen and a very suspect dentist.
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"The Hour That Never Was" is the ninth episode of the fourth series of the 1960s cult British spy-fi television series The Avengers, starring Patrick Macnee and Diana Rigg. It was first broadcast by Scottish Television on Tuesday 23 October 1965. ABC Weekend Television, who commissioned the show, broadcast it in its own regions four days later on Saturday 27 October. The episode was directed by Gerry O'Hara and written by Roger Marshall.
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Teleplay by Roger Marshall
Directed by Gerry O'Hara
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Cast
Patrick Macnee as John Steed
Diana Rigg as Emma Peel
Gerald Harper as Geoffrey Ridsdale
Dudley Foster as Philip Leas
Roy Kinnear as Benedict Napoleon Hickey
Roger Booth as "Porky" Purser
Daniel Moynihan as Corporal Barman
David Morrell as Wiggins
Fred Haggerty as Driver
Ray Austin as dead milkman (uncredited)
John Bennett as the cook (uncredited)
Cliff Diggins as a thug (uncredited)
Royston Farrell as an Officer (uncredited)
Terence Plummer as equipment operator (uncredited)