8.40-10.15pm tonight
The cast includes guest stars Sheridan Smith, Paul McGann and Stuart Milligan and Ian McNeice
The following programme description contains details which some viewers might prefer to avoid:
Spoiler:
Although this is a repeat of the feature-length special originally shown last Easter, very few people saw it at the time due to poor pre-publicity. It was always intended to be shown on New Year's Eve but was put back a few months due to various arguments at the BBC.
