Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
13 Episodes 1968 - 1968
Episode 1
Bill Cowan and Terry Driver discover that the complete crew of a nuclear submarine have been abducted from the London to Portsmouth train.
Episode 2
Bill and Chris track the kidnapped sailors to Von Gelb's hideout, where they discover his plans.
Episode 3
Von Gelb has gained control over a fully armed nuclear submarine, but is unaware that the three teenagers are on his trail.
Episode 4
Von Gelb demands £100 million in diamonds and demonstrates his intentions by launching one of the Polaris missiles.
Episode 5
With his threat against Britain successful, Von Gelb turns his attention to the rest of the world. But Buchan is on his trail.
Episode 6
Ships are disappearing from the ocean without a trace.
Episode 7
Something suspicious is going on at the Eureka cookery school.
Episode 8
Can the teenagers prevent the "Tromso" from being the next stolen ship?
Episode 9
Buchan discovers the deadly secret of Von Gelb's stolen fleet.
Episode 10
Eleven of the world's most eminent scientists have disappeared and Terry is kidnapped.
Episode 11
Buchan discovers the power of Von Gelb's mind control device.
Episode 12
Von Gelb has complete control over the weather and shows he is not afraid to use it.
Episode 13
Buchan has a plan to destroy Anvil, but is it too dangerous?