The Hesitation Deviation (audio story)

 was the twelfth story of the sixth season of Big Finish Productions' Short Trips series. The story acted as a Christmas special for the series; instead of being released on the final day of the month as stories in the series usually were, it was released two days before Christmas. The story starred Lisa Bowerman as Bernice Summerfield and an uncredited actor as a robotherapist, making it the second Short Trip to use multiple actors.

Publisher's summary
The Doctor brings Bernice Summerfield to a planet where they get Christmas just right. But this year, something's gone very wrong. An ancient force has been hunting the Doctor for a long time, and finally it has found him. As it closes in on the Time Lord, Bernice must make a truly terrible decision. One that she'll immediately forget.

Characters

 * Seventh Doctor
 * Bernice Summerfield
 * Robotherapist

Continuity

 * The Doctor's train set is mentioned. (PROSE: Model Train Set)