Back up to: Season 10
4/4 Omega intends to escape his antimatter world and needs the Doctors to take his place.
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3/4 The Doctors are trapped in the universe of antimatter where they confront Omega.
2/4 The Doctor and Jo pass through the black hole to the desolate world of antimatter.
1/4 Attacked by an antimatter creature the Doctor sends an SOS to the Time Lords.