Folly Tower and woodland. The New Avengers. Episode:Dead men are dangerous 1977
THE NEW AVENGERS: Dead Men are Dangerous (Sidney Hayers: Spring 1977)
Steed (Patrick Macnee) and Gambit (Gareth Hunt) attempt to enter the tower where Purdy is being held.
(Identified by Gareth Hughes, April 2003). http://avengerland.theavengers.tv/about.htm