12 Actors Who Want To Return To Doctor Who
8. Alex Kingston
The story of River Song was wrapped up beautifully in the 2015 Christmas special, but there are so many reasons why it makes sense for her to come back.
Chief among these is her wibbly-wobbly timeline, which makes it easy to say that her next adventure takes place anywhere between Let's Kill Hitler and The Husbands Of River Song, with little explanation necessary.
Combining this with the fact that she's one of the most fun companions in the show (and a perennial fan-favourite), and it's no surprise that Alex Kingston is gunning for River to re-appear, declaring that "I love the character, and I think that there are wonderful potential opportunities down the road" in a 2019 interview.
With such an open-ended timeline, it wouldn't be a shock to see River pop-up for another one-off adventure. She is the Doctor's wife, after all.