You can watch a high quality (480p) copy of ”Dimensions In Time” from 1993. Dimensions In Time part 1 was shown on Children in Need on BBC1 on 26th November 1993, while Part 2 was shown the next evening during Noel’s House Party on 27th November 1993.
Dimensions In Time came about after the proper 30th Anniversary show “Lost In The Dark Dimension” (or The Dark Dimension) was aborted. This was seen as a replacement for the Doctor Who fans. It does include some memorable moments such as the 6th Doctor’s scene with the Brigadier.