♾️
The Most Promising Girl of Her Year: Callan is ordered to investigate Joan Mather, a government laboratory scientist who has expressed concerns that her work might be used for biological warfare.
♾️
It features Edward Woodward, Michael Goodliffe, Anthony Valentine, Russell Hunter, Elizabeth Bell, and Clifford Rose.
♾️
Callan is a British espionage drama thriller television series, which originally aired between 1967 and 1972. It features Edward Woodward as David Callan, an agent of a British state secret service dealing with internal security threats to the United Kingdom. Callan's section is responsible for removing those who pose a danger to the "innocent" by persuasion, blackmail, extortion, or death.