The Deadly Whisper is the 9th episode of British television series The Secret Service.
Plot[]
Father Unwin becomes suspicious when a friend who has previously been a prize-winning rose-grower suddenly changes to dahlias. He soon discovers that a sonic rifle he has invented is to be used against a new hypersonic jet.
Father Unwin causes the plan to rebound on the captors by arranging for a fighter jet to fly over the area, creating a sonic boom which destroys the rifle.
Regular Cast[]
.png "Father Unwin (Deadly wisper).png (100 KB)")
Father Stanley Unwin
(Stanley Unwin)
(Stanley Unwin)
.png "Matthew (Deadly wisper).png (110 KB)")
Matthew Harding
(Gary Files)
(Gary Files)
.png "The Bishop (Deadsly wisper).png (111 KB)")
The Bishop
(Jeremy Wilkin)
(Jeremy Wilkin)
.png "Mrs Appleby (Deadly wisper).png (116 KB)")
Mrs. Appleby
(Sylvia Anderson)
(Sylvia Anderson)
Guest Cast[]
Anne Soames
(Sylvia Anderson)
(Sylvia Anderson)
Professor Soames
(Keith Alexander)
(Keith Alexander)
Eastman
(Jeremy Wilkin)
(Jeremy Wilkin)
Mark Slater
(David Healy)
(David Healy)
Kroner
(Keith Alexander)
(Keith Alexander)
Controller
(Jeremy Wilkin)
(Jeremy Wilkin)
.png "Pilot (Hypersonic jet).png (108 KB)")
Pilot
Hypersonic Jet
(Gary Files)
Hypersonic Jet
(Gary Files)
Rex
Cameo Roles[]
Co-pilot
Hypersonic Jet
Hypersonic Jet
Equipment Used[]
Hypersonic aircraft
Jet Fighter
Slater's Jeep
Sonic Rifle
Locations[]
Flight Research Establishment
Professor Soames' House
Trivia[]
- Although every episode of British Supermarionation television series The Secret Service was produced, the early episodes were first transmitted before the launch of ITV's colour service on 15 November 1969. "The Deadly Whisper" was the first episode to be transmitted in colour.
- This is the last episode to be featured David Healy in production order of the episode, although his credit was still used in after his departure.