Back up to: Season 20
4/4 Turlough must make a decision and it's one the Doctor and Tegan cannot help with.
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3/4 During an Eternals party Captain Wrack places a bomb aboard Striker's ship.
2/4 The Doctor realises that Striker is an Eternal and that the crew mean nothing to him.
1/4 The Doctor receives a dire warning from the White Guardian.