"Death's Door" is the eighteenth episode of the fifth series of the 1960s cult British spy-fi television series The Avengers, starring Patrick Macnee and Diana Rigg, and guest starring Clifford Evans, Allan Cuthbertson, William Lucas, and Marne Maitland. It was first aired on ABC on 7 October 1967. The episode was directed by Sidney Hayers, and written by Philip Levene.

An important peace conference is being held in Britain in which the British delegate Sir Andrew Boyd is due to make a ground-breaking agreement for the future of international relations in Europe. Boyd arrives at the conference centre and is surrounded by crowds of photographers. Suddenly he begins acting strangely. In a disoriented way, he approaches the Conference room door and has a powerful premonition that he will be killed upon entering the door. He refuses to enter and rushes from the venue.

Steed and Peel visit him and tell him to get some rest. Later, Boyd rings Steed after he has slept and tells him to drive very carefully down the hill on the way to visit him. On the way the brakes of the car Steed and Peel are in fail and they crash safely in the woods. Whilst Peel has the car attended to, Steed makes his way to Boyd where he demands an explanation for how Boyd knew he was going to crash. Boyd implies he thinks he is becoming psychic. The following day on the way to the conference, Boyd begins predicting events, from the button missing on the coat of the butler, and mentioning that he will see a lion before his death. Arriving at the rescheduled conference, Boyd again becomes disoriented but flees this time even before he enters the building and in doing so is killed by a passing car. The last thing he sees is a lion's head sculpture on the wall of the path approaching the building.

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