The 'Mad Men' episode "The Chrysanthemum And The Sword" had a major Zonk when Sally Draper REALLY enjoyed watching Illya Kuryakin in an episode of 'The Man From U.N.C.L.E.'.
Illya Kuryakin and Sally Draper should be sharing the same world. But at least with this clip we have a better splainin than the clips from 'The Defenders' about abortion, or a recent 'Sky King' clip.
Toobworld Central has established in the past that UNIT and U.N.C.L.E. and any other subsidiaries of the United Network (which is just code for the United Nations) use another agency to protect the identities of their operatives (and time-traveling consultants) by hiding them in plain sight - as characters in TV shows and movies which are produced by that agency. The "Doctor Who" movies starring Peter Cushing are just movies in the TV Universe as well. They are slightly based on true facts, but just different enough so that most of the population come to think any mention of the Doctor must be about the fictional character.
When another TV series shows scenes from the actual TV version of 'Doctor Who' (as opposed to creating their own as 'Extras' did), those are Toobworld recreations of actual events which are cast with actors who look like the Doctor and his companions.
The same holds true for 'The Man From U.N.C.L.E.'. If anybody outside the intelligence community ever hear the names of Napoleon Solo and Illya Kuryakin, they would just assume it was a reference to some TV characters.
So that's what happened in the case of Sally Draper watching 'The Hong Kong Shilling Affair". She wasn't um, having a good time while watching Illya Kuryakin; that was an actor who was playing the U.N.C.L.E. agent.
Maybe it was the televersion of David McCallum; maybe it was an actor character played by David McCallum in some other TV show or TV movie. (Does anybody out there know if McCallum ever play an actor on TV?)
By the way, in case you'd like to see that full scene from 'The Man From U.N.C.L.E.', here'sthe YouTube link. I'm afraid the capability to embed the video has been denied. However, this is also the finale, so consider this a spoiler warning........