The download above is a copy of the Martin & Lewis Radio Show from January 18th 1952. The guest that week was Frank Sinatra, who sings a song or two, and swaps some jokes with Dean and Jerry. Since it was 1952, Dean and Jerry's relationship was still very strong, but even so, the chemistry between Frank and Dean is clearly already in place. It's a great listen.
It's an extended edition (due to a new Buick being advertised on the show!), so it clocks in at around forty-five minutes.