The new channel here, GO, has a promo with this pic in colour, probably colourised. I've done a search of the gallery but couldn't find it in colour.
Does anyone have it or know where to find it?

Nice!

This looks like a publicity still from either the fourth or fifth season (1968/69). If it were published in a newspaper [on the "TV page"], a caption like this would accompany it:

"Agents 86 and 99 {Don Adams & Barbara Feldon} intercept an important call on their way to saving the world yet again on "GET SMART", tonight at ____pm on ____-TV".

:tv:

This is how "GO" coloured it, if wasn't originally in colour, of course.