With the Saint, if that's the Ian Ogilvy series, just checked Wiki and it is, then I think most of the programmes were shot on location, so the lack of the studios might not make a big difference. If I remember rightly many of them were set in Italy for cost purposes, despite a rumour I heard that they had to pay protection money to the Mafia to get them made!
There's one episode (a quick google tells me that it was called "The Poppy Chain") where Simon Templar helps a friend track down an organised crime gang based in France who supplied the drugs that killed his daughter. At the end of the episode, after disposing of the gang, the friend suggests to the Saint that they should go after the Mafia next
Cheers,
Nigel.