I know there's been a lot of fan speculation over the decades that DW and Terry Nation's dark sci-fi series Blake's 7 both take place in the same universe. In Chris Boucher's DW novel "Corpse Marker", the sequel to his DW television serial "The Robots of Death", he uses the character of Carnell from the B7 episode "Weapon", and in his Kaldor City audio stories, he uses both Carnell and the Fendahl from DW "Image of the Fendahl."
But just how compatible are DW and B7? After analysing both series, I came to the conclusion that it wasn't really plausible that they were the same, as there were too many differences; for example in B7, the teleportation device on the Liberator was beyond the Federation's technology, but DW "Revenge of the Cybermen", set circa the 25th-30th century, had a space station with a functional teleporter. I did theorise that perhaps the Fourth Doctor and Leela had crossed over into a parallel universe for their stories involving B7 characters, but then the presense of the Fendahl in Kaldor City suggests otherwise.
But just how compatible are DW and B7? After analysing both series, I came to the conclusion that it wasn't really plausible that they were the same, as there were too many differences; for example in B7, the teleportation device on the Liberator was beyond the Federation's technology, but DW "Revenge of the Cybermen", set circa the 25th-30th century, had a space station with a functional teleporter. I did theorise that perhaps the Fourth Doctor and Leela had crossed over into a parallel universe for their stories involving B7 characters, but then the presense of the Fendahl in Kaldor City suggests otherwise.