broadcast anniversaries
17 November 1979: broadcast of fourth episode of The Creature from the Pit. The wolf weeds kill Adrasta; Erato eats the wolf weeds; the Doctor prevents Chloris from being destroyed.
17 November 2008: broadcast of first episode of The Temptation of Sarah Jane Smith. The Trickster persuades Sarah to prevent her parents’ deaths.
In this case, it’s just a few advance glimpses of key moments – rather like deja vu but in reverse, if you see what I mean. So in fact of less practical use than Lovejoy’s psychic ability to detect genuine antiques!