First episode: February 20, 1949
Last episode: August 7, 1949? 
Seen Sundays on WNBT-TV New York  (Dumont)
Bill hosted this early game in which a team of actors performed a scene, then a viewer contacted by phone attempted to describe the nature of the scene being performed.  Actors were celebrities, frequently from the casts of current Broadway shows.

This was almost certainly a local NYC series, although nearly every reference book that mentions it offers conflicting information.  Sources have it airing as early as 1947 (unlikely), as a NBC network series, and under a variety of different names.  The Encyclopedia of TV Game Shows says the show began January 19, 1949 as Look Ma, I'm Acting before changing to Act It Out on February 20.  That same source also says the show changed its name to Say it With Acting on May 22, and continued under that title until October 22, 1950.  Say It With Acting was also the name of the 1951 network version that Bill did not host.

We don't know exactly how much of the original run Bill hosted, but in any case, this appears to be his first television series even if it wasn't a network program.  Strangely, no vintage newspaper or magazine profiles of Bill make mention of the show.

No episodes are known to have survived.