Location (The Man from MI.5)
From Tardis Wiki, the free Doctor Who reference
A scientist who gave the plans to a nuclear device to MI5 agent Captain Blacker was, in January 1965, living in a location which Jimmy Bondson couldn't disclose to Lady Penelope Creighton-Ward for security reasons when later explaining, in the Forest of Digne, why he needed International Rescue's help. (TV: The Man from MI.5)
Other sources dated the activities of International Rescue to the 1990s, (PROSE: The Dying Days) the 2060s, (PROSE: Titan Declares War! et al.) and the 2080s. (PROSE: Captain Scarlet in Death Crash! et al.)