The Avengers.S06E09.Legacy of Death

For revenge on Steed, an old enemy leaves him a deadly legacy in his will: a jewelled oriental dagger worth a million dollars, known as the Falcon, which various dangerous men are anxious to acquire. Steed is cast in the role of Sam Spade, in a spoof of The Maltese Falcon, with dead bodies piling up in his apartment as one man after another tries to kill him to get hold of the item. Ronald Lacey guest stars as Mr. Green, and Stratford Johns as Mr. Street, in a homage to Humphrey Bogart's co-star, Sydney Greenstreet.
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Teleplay by Terry Nation
Directed by Don Chaffey
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Guest Starring: Stratford Johns, Ronald Lacey, Richard Hurndall, John Hollis, Tutte Lemkow, Michael Bilton