Starting on the 14th (or rather the 15th) begins GSN's annual two week run of What's My Line? and I've Got a Secret at the 3/3:30am EST slots, respectively. Unsurprisingly, the WML? episode selection is a veritable who's who of celebrity passings from this year. IGAS seems to be a random selection of episodes.
WML
15th: 6/19/55 (Panel: Betty White, MG: Arnold Stang)
16th: 5/25/58 (Panel: Eammon Andrews, MG: Olivia De Havilland)
17th: 1/10/65 (Panel: Orson Bean, MG: Lee Remick)
18th: 10/3/65 (Panel: Martin Gabel, Ralph Meeker, MG: Sean Connery, Henry Fonda)
19th: 1971 (MG: Satchel Paige)
22nd: 1969 (MG: Bozo the Clown*, Stiller and Meara)
23rd: 1970 (MG: Mama Cass Elliot)
24th: 1971 (MG: Hugh Downs)
25th: 1973 (MG: Carl Reiner)
26th: 1974 (Panel: Phyllis George, MG: Barbara Feldon)
(*panel blindfolded, normal questioning)
IGAS
15th: 11/20/61 (Guest: Peggy Cass)
16th: 3/5/62 (Panel: Barry Nelson, Guest: Milton Berle)
17th: 9/13/65 (Guest: Carol Burnett)
18th: 2/14/66 (Panel: Arthur Godfrey, Guest: Phyllis Diller)
19th: 11/22/65 (Guest: Ethel Merman, Satchel Paige)
22nd: 12/26/66 (Guest: Paul Anka)
23rd: 3/20/67 (Guest: Jim Backus, penultimate episode)
24th: 1972 (Guest: Greg Morris)
25th: 1972 (Guest: Marty Allen)
26th: 1973 (Guest: Chad Everett)
There are two Blyden episodes that feature Barbara Feldon, and I don't know how to figure out which one is airing, but I'm assuming it's the one with Phyllis George.
Is there some milestone I'm missing with Satchel Paige? As one night (the 19th) will feature both his WML? and IGAS appearances. Perhaps just someone noticing he did both shows and putting them together.