I went to youtube and typed in Deforest Kelley/Merv Griffin and found that segment in a few seconds.
Hmm... I tried to do that, but I didn't find anything of interest. Could you give more information or a direct link?
By the way I already posted the link to the ET special some time ago (
here). To my knowledge this is the only behind the scenes footage ever released of Star Trek II, which is somehow surprising. Despite the fact it is the most popular Trek movie, no behind the scenes footage has ever surfaced from Paramount. I can't believe thay didn't shoot any, it surely was a big production at the time. Even The Motion Picture has its own featurette, but not The Wrath of Khan.
So thanks to ET.
Best,
Maab