The Deadly Air
by Lester Powell
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 Steed is convinced that Craxton has fatally poisoned him, until it is revealed that the lethal vaccine had been replaced by water as a security measure.
Cast
* mug shots in sepia denote images sourced from other productions.
| Barbara Anthony | Ann Bell {Callan}{Dangerman}{The Saint} |
| Dr Philip Karswood | Michael Hawkins {regular}{Dr Who}{Police Surgeon}{The Saint} |
| Heneager | Keith Anderson {Adam Adamant}{Dr Who} |
| John Steed | Patrick Macnee {regular}{New Avengers}{007} |
| Herbert Truscott | Richard Butler |
| Dr David Keel | Ian Hendry {regular}{New Avengers}{Dangerman}{Police Surgeon}{The Saint}{The Sweeney} |
| Dr Hugh Chalk | Allan Cuthbertson {regular}{Dangerman}{The Saint}{The Champions}{Jason King}{UFO}{Callan} |
| Dr Owen Craxton | John Stratton {The Professionals}{Dr Who}{UFO} |
| One-Ten | Douglas Muir {regular}{The Saint} |
| Carol Wilson | Ingrid Hafner {regular}{Police Surgeon} |
| Dr Harvey | Cyril Renison {regular} |
| Ken Armstrong | Anthony Cundell |
| Professor Kilbride | Geoffrey Bayldon {regular}{Dr Who}{Dangerman}{007}{The Saint}{Pink Panther}{Space 1999} |
| Not billed in TV Times magazine | |
|---|---|
| Nurse | unknown |
Crew
| Teleplay by | Lester Powell {regular} |
| "The Avengers" Theme composed and played by | Johnny Dankworth {regular} |
| Designed by | Robert Macgowan {regular} |
| Producer | Leonard White {regular}{Callan}{Police Surgeon} |
| Directed by | John Knight {regular}{Police Surgeon} |
Minutiæ
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