Actor and comedian John Bishop will be joining the 13th Doctor and Yaz on the TARDIS on the upcoming 13th season of BBC America’s Doctor Who, . Accroding to BBC. Season 13 began filming in November and is expected to premiere later in 2021. 
Bishop will play Dan in the new season. As he becomes embroiled in the Doctor’s adventures, Dan will quickly learn there’s more to the Universe(s) than he could ever believe. Traveling through space and time alongside the Doctor and Yaz, he’ll face evil alien races beyond his wildest nightmares.
The 54-year-old actor, who recently tested positive for coronavirus, said joining the sci-fi series was a ''dream come true''. "If I could tell my younger self that one day I would be asked to step on board the TARDIS, I would never have believed it. It's an absolute dream come true to be joining Doctor Who and I couldn't wish for better company than Jodie and Mandip,'' said Bishop.
"It's time for the next chapter of Doctor Who, and it starts with a man called Dan. Oh, we've had to keep this one secret for a long, long time. Our conversations started with John even before the pandemic hit. The character of Dan was built for him, and it's a joy to have him aboard the TARDIS, '' Chibnall said. Bishop replaces Bradley Walsh and Tosin Cole, who were confirmed in November to depart the series following the New Year's Day special.

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