The only episode to feature a kiss between John Steed and Catherine Gale.
Lois Maxwell was best known for playing Miss Moneypenny in the James Bond films. Honor Blackman was in Goldfinger (1964), while Patrick Macnee was in A View to a Kill (1985). Furthermore, David Bauer had small parts in You Only Live Twice (1967) and Diamonds Are Forever (1971).