More What's My Line?

The other day, we had the cast of the musical Bye Bye Biride appearing at length on the Ed Sullivan Show,  including singing thte song, "Hymn to a Sunday Evening" about appearing on the Ed Sullivan Show.  I thought it only appropriate therefore to have Ed Sullivan himself appearing as the Mystery Guest on What's My Line?

Adtually this is his time time on the show.  For his first vist, the notoriously humorous TV host went full goofball, apperaing in a gorilla mask.  This time around, five years later (this in 1963), he steps out as himself, but is

again having a fine old time.