22 October (production)


 * 1963 - Donald Baverstock's 18 October memo concerning production costs was considered, and it was decided to produce thirteen episodes with a budget of £2,500 each.
 * 1965 - "The Nightmare Begins" was recorded at BBC Television Centre 3. (TCH 6)
 * 1966 - Episode one of The Power of the Daleks was recorded at Riverside Studios 1. (TCH 9)
 * 1969 - Location filming for Spearhead from Space took place. (REF: Doctor Who The Handbook: The Third Doctor)
 * 1971 - Location filming for The Sea Devils took place. (REF: Doctor Who The Handbook: The Third Doctor)
 * 2008 - Recording for The Cannibalists took place at The Moat Studios.
 * 2012 - Recording for the second series of Counter-Measures took place at The Moat Studios.
 * 2014 - Big Finish's audio anthology The Third Doctor Adventures was recorded at the Moat Studios.
 * 2015 - Recording for Death and the Queen took place at the Moat Studios.
 * 2016 - Big Finish confirmed the thirteenth series of Jago & Litefoot.
 * 2017 - Bradley Walsh, Tosin Cole and Mandip Gill were officially announced as new companions Graham O'Brien, Ryan Sinclair and Yasmin Khan.
 * 2018 - Recording for Heritage 1 took place at The Soundhouse.
 * 2018 - Big Finish announced that Jon Culshaw had been cast as Brigadier Lethbridge-Stewart, recreating the role originated by Nicholas Courtney.
 * 2020 - Big Finish's audio anthology The Third Doctor Adventures: Volume Seven was recorded.
 * 2021 - Big Finish's audio anthology Blood & Steel was recorded at the Soundhouse.