At Station 5 ghostly happenings have been killing the staff.
At Station 5 Professor Leslie Mullen has tuned the Station 5 radio telescope towards a signal which has brought about ghostly apparitions.
Soon, people are dying and the Doctor and Sarah Jane are there to investigate.
While investigating a ghostly apparition kills one man, and leaves Sarah Jane in hospital.
With the assistance of Stephen Wilder the Doctor continues to investigate while Professor Mullen evacuates his staff.
Following the attack Sarah Jane returns from hospital, saying that she couldn't just lie there not doing anything…but then attempts to shoot the Doctor with a gun.
The Doctor stops her; realising she's under alien influence, along with the the Reverend Wagstaff and his followers.
Above Station 5 a ghostly apparition is taking shape and taking control of the people now congregated around it. The Doctor confronts "the Master Reverend" and engages him in a mental battle. Defeating it by suggesting to the ghostly aliens that everyone on Earth has the mind might as a Time Lord.
- Fourth Doctor
- Sarah Jane Smith
- Professor Leslie Mullen
- Reverend Wagstaff
- Stephen Wilder
- Inspector Riggs
- Alfred Brinkley
- The Doctor can read Ancient Latin.
- The Doctor engages the ghost in a mental battle.
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