10 Doctor Who Characters That Should Return

10. Susan Foreman

I know. This one is an obvious choice, given her importance to The Doctor's character. Susan is The Doctor's granddaughter at the end of the day, and was his original companion all the way back at the very beginning. More than that, she was essentially the lure into the mysteries world of her grandfather, being this strange, alien-like being that peaked Ian and Barbara's interests, which inevitably began their adventurous journey aboard the TARDIS.

At the end of the day, she hasn't been a recurring companion since The Dalek Invasion of Earth, where The Doctor decided to leave her behind to find a new life for herself. Her last on screen appearance was during The Five Doctors. That's a long time ago!

Naturally, Big Finish have delved into her character, and explored what happened after she was left behind. Though, if you've listened to To the Death, you'll know it didn't with her being on particularly good terms with The Doctor, which is something worth exploring in the future. I haven't listened to Susan's War as of yet, but it is interesting knowing she became involved within the Time War, so of course, you want to explore how this changed her further, and how much more damage was put on her relationship with her grandfather.

Furthermore, in context with the current storyline, it'd certainly be fascinating seeing how Susan's character is explored. Was she even aware of The Doctor being the Timeless Child? Chances are she was just as much in the dark as was her grandfather (and everyone else for that matter), so it'd probably come as a shock to her to discover that Time Lord society all revolved around The Doctor. Would this change her dynamic with her grandfather?

Heck, is she even The Doctor's granddaughter? I mean, their dialogue in An Unearthly Child seems to indicate they were running away from the Time Lords for a reason, so was it simply because The Doctor stole a TARDIS? Could there be more to the mystery that could neatly be explored nearly sixty years after the show's very beginning?