call-in show

noun1

1. •
   In television or radio programming, a type of talk show in which a host and one or more guests sometimes converse with members of the listening or viewing audience who telephone the show while the program is being broadcast.

   • Billed as "the first and only" nationwide call-in show," it invites listeners to "call collect from anywhere in North America to have a heart-to-heart squawk." — 1969