Dimensions in Time
Dimensions in Time is a charity television special crossover between the science fiction series Doctor Who and the soap opera EastEnders, broadcast in two parts on 26 and 27 November 1993 for Children in Need. In celebration of Doctor Who's 30th anniversary, it features every surviving actor to have played the Doctor as well as several of the character's companions. In this special, the amoral scientist the Rani (Kate O'Mara) traps various incarnations of the Doctor (Sylvester McCoy, Colin Baker, Peter Davison, Tom Baker and Jon Pertwee) in a time loop in Albert Square.
Doctor Who was put on hiatus in 1989. A 30th anniversary "multi-Doctor" special, The Dark Dimension, began development in mid-1992 but fell through by July 1993. In May 1993, producer John Nathan-Turner was asked to produce a Doctor Who sketch for the charity Children in Need. The script, co-written by Nathan-Turner and David Roden, went through many iterations due to the changing availability of the cast. A crossover with EastEnders was pitched to guarantee publicity for Children in Need and to allow the production to film on existing sets.
The special was filmed in 3D on location at Greenwich and the EastEnders Albert Square set in September 1993. None of the cast or crew were paid for their work due to an agreement with Equity. Dimensions in Time was universally panned by both critics and fans, with criticism aimed at the plot, special effects and cameos from the contemporary cast of EastEnders. Due to Children in Need's high licensing fees, it is unlikely to ever receive a home video release. It is not considered "canon" to the Doctor Who universe.