Jo Grant is shocked to find most of her colleagues are missing. Then she discovers that the Doctor has inexplicably changed.
But there’s no time to worry about it, as she and her misplaced Time Lord friend are whisked to the mysterious Delphin Isle on a matter of national security. There, they encounter a disturbingly odd form of local hospitality and learn of a highly classified incident that took place during the Cold War.
Why exactly have they been brought here? And what is the truth concerning the bodies in the harbour and the vast project being undertaken beneath a cloak of secrecy?
'...it possesses a wonderful nostalgic quality, aided no doubt by the incredible chemistry between, and performances from Sylvester McCoy and Katy Manning... It’s absolutely marvellous. In fact it’s marvellous with an extra dollop of brilliant on top. More please!' Tim Mass Movement
'... well handled concepts and twists alongside strong performances... an entertaining adventure... most effective in the way it blends the action and military intrigue of the Pertwee era with the darker, more ambiguous edge of McCoy's Doctor.' SFX