Schedule info for the panel shows:
12/18:
What's My Line (Blyden): Jimmy Carter/Joan Fontaine
I've Got a Secret (1972): Bob Barker
12/19:
What's My Line (Daly): Raquel Welch
I've Got a Secret (Allen): Garry Moore
12/20:
What's My Line (Daly): Gina Lollobrigida
I've Got a Secret (Moore): Hugh O'Brian
12/21:
What's My Line (Blyden): Brooks Robinson
I've Got a Secret (Moore): Martha Raye/Arthur Murray
12/22:
What's My Line (Bruner): Little Richard
I've Got a Secret (Moore): Roy Rogers
12/25:
What's My Line (Daly): Tony Bennett
I've Got a Secret (Moore): Christmas Eve 1962
12/26:
What's My Line (Daly): Harry Belafonte, Nanette Fabray, Robert Ryan
I've Got a Secret (Allen): Eydie Gorme
12/27:
What's My Line (Bruner): Stella Stevens
I've Got a Secret (Moore): Boris Karloff (1963)
12/28:
What's My Line (Blyden): Jim Brown
I've Got a Secret (Allen): Alan King, the IGAS and TTTT panels have swapped shows for this episode
12/29:
What's My Line (Bruner): Johnny Mathis
I've Got a Secret (Allen): Omar Sharif