Susan
Let’s dive right back to the beginning of Doctor Who. For the first year of the show, the Doctor travelled with his granddaughter Susan – the only member of his Gallifreyan family we’ve ever met. As the mystery surrounding the Doctor’s past increased, the series partially swept the memory of Susan under the rug, but what if the character was to come back fifty years later?
In a similar way to how it was thrilling to see the two ends of the series collide in the recent “Twice Upon a Time” Christmas special, which featured the First Doctor teaming up with the Twelfth, we’d love to see what Susan would make of how different her “grandfather” is from when she last saw him. Obviously, she’s now a woman but the character has also changed personality in so many ways.
The original actress, Carole Ann Ford, even still plays the role from time to time on the radio, while Claudia Grant also played a recast version in 2013’s biopic An Adventure in Space and Time. Alternatively, if they wanted to do a completely different take on Susan, she is a Time Lady, so that would be easy to do. Basically, there are several options here and few reasons why this wouldn’t be fantastic to see.