| Series: | The Avengers |
| Season: | 2 |
| Episode: | 9 |
| Production: | 3502[1] |
| Director: | Don Leaver |
| Music: | John Dankworth (theme) |
| Guests: |
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| Episode List: | List of The Avengers episodes |
| Prev: | Death of a Great Dane |
"The Sell Out" is the ninth episode of the second series of the 1960s cult British spy-fi television series The Avengers, starring Patrick Macnee. It was first broadcast by ABC on 24 November 1962. The episode was directed by Don Leaver and written by Brandon Brady and Anthony Terpiloff.[2]
Steed, though under suspicion himself, leads an operation to flush out a traitor plotting to assassinate a foreign dignitary.[3] Dr. King initially refuses to be involved, but comes to Steed's aid.