The Ministry has been broken into by, it seems, an invisible man. A trail leads via inventor Quilby to the Eastern Drug Company, a front organisation run by Soviet intelligence. Meanwhile, the crack spies Elena and Alexandre Vazin are in town. But nobody has seen anything of Alexandre...
Elenco:
Patrick Macnee
,
Honor Blackman
,
Diana Rigg
,
Linda Thorson
,
Ian Hendry
.