Craig is captured by Dr. Hallam and has a small device implanted into his ear while unconscious. When Craig re-awakens, he hears voices in his head giving him orders. Richard and Sharron must get to Craig before he is killed.

While investigating the murder of three students in the Austrian Alps, the Champions discover a map that leads them to a mine where a group of German soldiers were buried alive by the SS.

The Champions find themselves hot on the trail of a broker when asked to investigate a man whose plans for a revolutionary aircraft have been shelved.

Richard and Sharron accompany a visiting President and his wife on a submarine journey, but an assassination attempt means that they will require all of their powers to save the President.

Craig and Sharron pose as a gangster and his moll in an attempt to block an escape route for criminals.

Craig, Richard and Sharron have to follow the path of a nuclear submarine in which all of the crew were found dead.

Sharron takes a few days' holiday in Cornwall and disappears. Craig and Richard's search leads them into an encounter with hooded monks, ghostly woods and the supernatural.

Craig poses as a prison inmate to find out who is attempting to free another prisoner. His subsequent escape leads him into further danger.