The 873rd episode of Doctor Who airs on BBC1 (the 174th episode since the series’ revival), starring Jodie Whittaker, Mandip Gill, and John Bishop. Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, Janet Fielding, and Sophie Aldred guest star. This the third of three specials to air in 2022 in lieu of a full season, timed to coincide with the celebration of 100 years of the British Broadcasting Corporation. It is also the end of Jodie Whittaker’s tenure as the Doctor, and the end of executive producer Chris Chibnall’s sometimes controversial tenure as showrunner.