Historical clue formulations

• Hit BBC series since 1963, informally — 2022-11-29
• TV series with a Time Lord, informally — 2022-11-23
• BBC sci-fi series, informally — 2018-01-24
• BBC sci-fi show — 2013-05-07
• BBC time-traveling series — 2012-12-19
• "Torchwood" was spun off from it — 2011-04-16
• Show featuring an alien from the planet Gallifrey — 2010-04-10
• BBC sci-fi classic — 2006-03-20