The Grel Escape

The Grel Escape is a Big Finish Productions audio drama featuring Lisa Bowerman as Bernice Summerfield, a character from the spin-off media based on the long-running British science fiction television series "Doctor Who".
Plot.
The fact-obsessed Grel chase Peter throughout time and space after he manages to use Bernice and Jason's Time Rings.
Trivia.
This story is a spoof of the Doctor Who adventure "The Chase".