The First and The Second join The Third on an adventure in an anti-matter universe for the Ten Year Anniversary of Doctor Who
It’s the Ten year Anniversary of Doctor Who and to treat Whovians around the globe, Pertwee’s Third Doctor joins forces not only with companion Jo Grant and Brigadier Alistair Gordon Lethbridge Stewart — aka Bag(e)ls – but with William Hartnell’s First Doctor and Patrick Troughton’s Second Doctor to boot!
When a black hole appears and a beam of condensed light, a rainbow road or something like that shoots out of it and begins to consume all of Galifrey’s energy, “Some kind of powerful organism thing” is sent to Earth to hunt The Doctor. Thus, the Time Lords come up with an ingenious plan to provide The Doc with some backup.
Now joined by his two prior incarnation, Doc & Co must travel through the black hole into an anti-matter universe to confront a very disgruntled civil engineer with a comedically sized helmet and a rather limited imagination.