The Perpetual Bond (audio story)

Synopsis
When the TARDIS materializes in a familiar junkyard in the 1960s, the Doctor and Steven are soon embroiled in a mystery in the City of London. Who are the mysterious bowler-hatted businessmen with their deadly umbrellas? And what secret is young Oliver Harper desperately trying to conceal?

Contracts have been signed. A deal is in place. And the Doctor discovers that perhaps not even he can stop a terrible business...

Cast

 * Steven Taylor - Peter Purves
 * Oliver Harper - Tom Allen

Story notes

 * This is the first Big Finish audio drama to introduce a new companion for any incarnation of the Doctor prior to the Fifth.

Continuity

 * Steven recalls the recent deaths of Katarina, Bret Vyon and Sara Kingdom (DW: The Daleks' Master Plan) and the departure of Ian Chesterton and Barbara Wright (DW: The Chase).
 * The Doctor returns to I.M. Foreman's junkyard at 76 Totter's Lane for the first time since the events of DW: An Unearthly Child. He would later do so again in 1963 (ST: Those Left Behind, DW: Remembrance of the Daleks) and 1985 (DW: Attack of the Cybermen)
 * Steven refers to his previous visit to London in 1912. (CC: The Suffering)

Timeline

 * The Perpetual Bond occurs after ST: Do You Smell Carrots?
 * The Perpetual Bond occurs before CC: The Cold Equations