The Avengers: Too Many Christmas Trees (1965)
Not to be confused with Earth's Mightiest Heroes, the Avengers was a British spy series from the 60s which cycled through a number of iterations and styles. We've looked at a later episode, " Take-Over ," that sort of fit our loose definition for Christmas in July (absurdly loose: Take-Over was set in February, and the holiday elements only appeared briefly). "Too Many Christmas Trees," on the other hand, was far more entrenched in holiday fare. It was also a more iconic example of the series, featuring Emma Peel, by far the best known of John Steed's partners. In this one, they're pitted against a team of psychics attempting to steal national secrets from Steed's mind by eroding his sanity through a series of yuletide nightmares. This should already be obvious, but I loved the hell out of this episode. All of this is set at an English mansion where Peel was invited for a Christmas party. She invites John after the idea to bring him jus