Secret Service (writing as John Theydon)
The Destroyer (1969)
The V.I.P. (1969)

Conquerors of Venus (writing as Edgar Rees Kennedy)
Astro Race (1951) (writing as King Lang)
Gyrator Control (1951) (writing as King Lang)
The Mystery Planet (1951) (writing as Edgar Rees Kennedy)
Projectile War (1951) (writing as King Lang)
Rocket Invasion (1951) (writing as King Lang)
Saturn Patrol (1951) (writing as King Lang)
Task Flight (1951) (writing as King Lang)
Space Line (1952) (writing as King Lang)
Terra! (1952) (writing as King Lang)

Stingray (writing as John Theydon)
Stingray (1965)
Stingray and the Monster (1966)

Thunderbirds
Calling Thunderbirds (1966) (writing as John Theydon)
Lost World (1966)
Operation Asteroids (1966)
Ring of Fire (1966) (writing as John Theydon)
Thunderbirds (1966) (writing as John Theydon)
Lady Penelope: The Albanian Affair (1967) (writing as John Theydon)

Captain Scarlet and the Mysterons (writing as John Theydon)
Captain Scarlet and the Mysterons (1967)
Captain Scarlet and the Silent Saboteur (1967)
The Angels and the Creeping Enemy (1968)