Spoilers are precisely defined here. Rules vary by the story's medium. Info from television stories can't be added here until after the top or bottom of the hour, British time, closest to the end credits roll on BBC One. Therefore, fans in the Americas who are sensitive to spoilers should avoid Tardis on Sundays until they've seen the episode.
Episode 1 (Text synopses only as episodes exist in the BBC Archives)
Episode 3 (Text synopses only as episodes exist in the BBC Archives)
Each missing episode is presented as a four-page spread of 63 telesnap stills with accompanying episode summaries.
Episodes with introduction and summaries are arranged in televised order. Where a televised record exists the story is told in a one-page summary with the telesnap reconstruction compiled by Jonathan Morris and/or Matthew Pereira.
It is not just the original televised stories that are missing from the archives. There are also a number of telesnaps missing. Many of these were in the private hands of people involved in the making of the show as a record of their work. The final discovery to date of telesnaps was in October 2003 which led to the recovery of six of the seven episodes of Marco Polo from director Waris Hussein.