However, after two series travelling through time and space in the TARDIS, Walsh will be bowing out.
Speaking to Doctor Who TV about leaving the show, Walsh said: “Working in Wales with everyone on the crew. I have absolutely loved it, loved it.
“Wales has become like a second home to me and being included in something so iconic and ground-breaking with the advent of having a female Doctor, that whole thing where Chibnall sold that to me, it didn’t disappoint, and I loved working with those guys.”
He added: “I love working with Chris Chibnall, that man is a genius but to also be working with Mandip and Tosin and of course Jodie is just extraordinary.”