• title card: The Deadly Air superimposed on a close-up of Dr Karswood
  • publicity still: Steed chats up Barbara
  • publicity still: Dr Kilbride takes time out from his yoga to talk to Dr Keel
  • publicity still: Heneager attacks Armstrong
  • publicity still: Steed and Dr Keel question Dr Harvey
  • Steed, thinking himself infected and self-quarantined, peers out the porthole as Dr Chalk shows him the real ampules have been returned and he is safe to come out

Series 1 - Episode 24
The Deadly Air

by Lester Powell

Production completed: 7 September 1961. First transmission: 16 December 1961

When several experiments with a new vaccine go wrong, Steed and Dr Keel volunteer for the next test. One of the scientists, Heneager, appears to be sabotaging the project and a potent airborne virus nearly kills the Avengers. As Keel interrogates Heneager for the truth, Steed is discovering that Dr Craxton is the real mastermind. Steed is convinced that Craxton has fatally poisoned him, until it is revealed that the lethal vaccine had been replaced by water as a security measure.


Teleplay by Lester Powell regular
"The Avengers" Theme composed and played by Johnny Dankworth regular
Designed by Robert Macgowan regular
Producer Leonard White regularCallanPolice Surgeon
Directed by John Knight regularPolice Surgeon


  1. We don't have any... yet.

Support this site via Paypal Join us on Facebook Become a Patron!