on I've Got a Secret on October 24, 1966:

http://www.youtube.com/watch?v=SAqnKbs9ICY&feature=related

At 4:12, they refer to Lucy in London as the special "coming up on CBS," as if it's a future event. However, Lucy in London aired on October 24, 1966 (in color) from 8:30 to 9:30 PM. This I've Got a Secret supposedly aired at 10:30 PM that same night after Lucy in London:

http://www.imdb.com/title/tt1252997/

So I'm confused by Steve Allen referring to the special as something coming up at a later date.

Perhaps the taped episode aired later than planned? At any rate I've Got A Secret was also in color by this time, it's just this kinescope copy of it that's black & white.

Perhaps the taped episode aired later than planned? At any rate I've Got A Secret was also in color by this time, it's just this kinescope copy of it that's black & white.

That's certainly a possibility. I thought of another possibility: perhaps the schedule was rearranged that night and I've Got a Secret aired earlier in the evening, before Lucy's special. But then I found this:
http://news.google.com/newspapers?id=FEsqAAAAIBAJ&sjid=V08EAAAAIBAJ&pg=7140,4479185&dq=lucy+in+london&hl=en

If you scroll over to the right, you can see I've Got a Secret was scheduled to air at 10:30 PM that night, as usual. So Lucy was on there promoting a show that had already aired!