The 20th season of the original Doctor Who aired in 1983, featuring Peter Davison as the Fifth Doctor. It started on January 3 and ended on March 16, 1983, with a special 20th Anniversary episode titled "The Five Doctors" airing later in November 1983. This special included the return of past Doctors (portrayed by Patrick Troughton, Jon Pertwee, and Richard Hurndall as the First Doctor, since the original actor had died) and companions, celebrating two decades of the show since its 1963 debut.
Separately, the 20th anniversary of the Doctor Who revival (which started in 2005 with the Ninth Doctor played by Christopher Eccleston) was celebrated in 2025. This revival brought Doctor Who back after a 16-year hiatus, and its 20th anniversary includes special programs, documentaries, and celebrations involving current and past cast and crew, including showrunner Russell T Davies and actors like David Tennant and Ncuti Gatwa.
To sum up:
Anniversary Context| Year Celebrated| Key Event/Feature| Notable
Actors/Details
---|---|---|---
Original Series 20th| 1983| Season 20 aired, plus 20th Anniversary Special
"The Five Doctors"| Peter Davison (5th Doctor), return of classic Doctors
Revival Series 20th| 2025| 20th anniversary of 2005 revival, with specials and
documentaries celebrating the show's return| Christopher Eccleston (9th Doctor
revival), Russell T Davies, David Tennant, Ncuti Gatwa
If you want more details on either the classic 20th season or the revival's 20th anniversary celebrations, I can provide them.