The Doctor needs to return to Gallifrey but, because of Romana's action in the previous adventure, he is dreading the paperwork and official inquiry. Instead he convinces Adric they should stop by Earth to take some measurements of a police box before heading to Logopolis to have repairs completed to the Chameleon Circuit. Arriving on Earth the Doctor senses something wrong. A time bubble has formed, causing a TARDIS to appear within a TARDIS. The Doctor fears it's an infinite regression. If so, he and Adric will be trapped forever. Meanwhile Tegan, an Australian airline hostess, enters the Doctor's TARDIS after her car breaks down.
Did You Know?
The policeman using the telephone in the police box in the opening scene of the story is named in Christopher H. Bidmead
's novelisation as P.C. Donald Segrave. This was not derived from any information given in the televised version. See more
I sometimes think I should be running a tighter ship.
A tighter ship?
Yes. The second law of thermodynamics is taking its toll on the old thing. Entropy increases.
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