The Dark Dimension (unproduced TV story)
From Tardis Wiki, the free Doctor Who reference
The Dark Dimension was a 1993 aborted television film that was to feature the five surviving Doctors at that time. The film was to comemorate the 30th anniversary of the show. Producer of the 1996 TV film, Philip Segal said that he is directly responsible for stopping production of The Dark Dimension, while he was negotiating with Amblin Entertainment and the BBC on the shows return. The script was criticized for heavily featuring the fourth Doctor. The Dark Dimension is a parrallel universe where the fourth Doctor has not regernerated but has grown old and seemingly evil. K-9 would have also featured.