On the subject of ITC, I have been watching a somewhat forgotten (perhaps rightly) series called The Adventurer.
It stars American actor Gene Barry as Gene Bradley (get it?), secret agent/investigator/spy who works for some branch of the British government and who uses a cover as one of the most famous movie actors who lived. Everyone knows Gene. I mean, everyone. How he has survived as a secret agent is never explained. Gene knows everyone who is rich and famous, and has had affairs with many.
There were twenty six half hour episodes, well, after adverts it was barely 25 minutes, and comes from the early 1970s.