So much of the '60s spy genre is campy, and I love that, but this is an exception. If for no other reason to recommend this film, the art direction and cinematography is outstanding with well-considered shot after shot getting the most out of the impressive locations. The colour of the film jumped out at me too, not the expected '60s Eastman colours, but more of a Douglas Sirk '50s kind of style. But, there's more. Not wanting to give too much away, the lead character is a dislikable creation who only grows on you a little as the film progresses, but is fascinating to watch throughout; he reminded me of Jason King with all traces of campery banished. Mia Farrow is a complete delight every moment she appears on screen, and there's an impressive cast of actors you will recognise from, well, everything, popping up, most of them I didn't know by name but knew by sight. Peter Cook's performance is effectievly the comic relief, however he plays it the right side of funny to blend in with the general seriousness of the proceedings and gives his role depth when called for. Richard O'Sullivan (Man About the House) even appears in a small role as the (implied gay) best friend to Mia Farrow's character. Most enjoyable for anyone who appreciates '60s Spy cinema, and after watching this I even more so wish there was a way I could visit late '60s London and Berlin!