Collision Course (audio story)

 was the sixth and final story in the audio anthology The Legacy of Time, produced by Big Finish Productions. It was written by Guy Adams and featured Tom Baker as the Fourth Doctor, Louise Jameson as Leela and Lalla Ward as Romana.

Publisher's summary
Fallout from the temporal distortions has now reached Gallifrey. To find the cause, Leela and Romana remember travels with the Fourth Doctor to the same world, at different times. The enemy is revealed, and it may take more than one Doctor to prevent the destruction of everything!

Plot
to be added

Cast

 * The Doctor - Tom Baker
 * Romana - Lalla Ward
 * Leela - Louise Jameson
 * Tompino - Alan Cox
 * Punshon - Richard Earl
 * Ankarrie / Sirens - Rebecca Kilgarriff
 * Bernice Summerfield - Lisa Bowerman
 * The Doctors - David Bradley, Frazer Hines, Tim Treloar, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant
 * Alien Voice - Nicholas Briggs

Continuity

 * The Sixth Doctor mocks the Fifth Doctor for the amount of time it took him to get Tegan Jovanka to Heathrow Airport. (TV: Time-Flight) The Seventh Doctor does the same with the Third Doctor about his attempts to get to Metebelis III. (TV: The Green Death)
 * After witnessing the behaviour of his tenth incarnation, the First Doctor states that he's putting "serious consideration to never regenerating" which he later did immediately before the change. (TV: The Doctor Falls, Twice Upon A Time)
 * The Fourth Doctor notes to Leela his affection for ginger beer. (TV: The Android Invasion)
 * Romana tells Leela that the TARDIS was built to have six pilots. (TV: Journey's End)
 * The TARDIS becomes a regular police box as a result of a time paradox. (TV: Father's Day)