Department S (1969)

S1E16 A Ticket to Nowhere

At Heathrow Airport in London on December 6th, a pilot making a landing spots a man on the runway and tragically hits him, resulting in his death. Jason, who is at the airport to catch a flight to Paris, unknowingly gets involved when he meets the niece of the deceased. Upon arriving in Paris, the Department is tasked with locating a missing scientist known for creating a cutting-edge brainwashing technique. To Jason's shock, he soon learns that the man in pajamas found on the runway is the very scientist they’ve been searching for.