The Doctor has regenerated but it hasn't gone well. He's mentally unraveling and needs a place to rest beyond outside influences. Unfortunately the Master has laid a trap for the TARDIS that denies the Doctor undisturbed recovery time.
Did You Know?
This story replaced a script called Project Zeta Sigma by John Flanagan
and Andrew McCulloch
, which didn't immediately follow on from Logopolis and concerned nuclear disarmament. It was deemed unworkable. See more
I left a waistcoat like that on... Ever been to Alzarius?
I was BORN there, Doctor.
Really? It's a small universe, isn't it.