"The Hidden Tiger" is the eighth 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 Ronnie Barker, Lyndon Brook, Gabrielle Drake, and John Phillips. It was first broadcast in the Southern and Tyne Tees regions of the ITV network on Wednesday 1 March 1967. ABC Weekend Television, who commissioned the show for ITV, broadcast it in its own regions three days later on Saturday 4 March. The episode was directed by Sidney Hayers, and written by Philip Levene.

Housecats are suddenly turning into ravaging beasts and mauling their owners fatally. Steed and Emma set out to investigate P.U.R.R.R. where the cats come from.