The Extinction Event 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.
Only one object survived the destruction of the planet Halstead - a harp. Bernice visits an auction house to buy the Halstead Harp but finds that someone else also has an interest in it - and they're willing to kill...