Sheila Dunn als Dr. Petra Williams
Afleveringen 2
Inferno (5)
6 juni 1970
• 25m
7x23
The parallel Inferno has broken through the Earth's crust, unleashing terrible seismic forces and dooming the planet. The Doctor hopes to return and save his world. But the bestial primords are closing in...
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Inferno (6)
13 juni 1970
• 25m
7x24
The Doctor is trapped in a parallel world that is going up in flames. Can he escape in time to save Earth in his own universe?
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