This episode provides a few details about Marshal Troop's (John Russell) back story. Troop was a Captain in the Union army and fought during the Civil War. He has put the war behind him and declares that when he took off his uniform, he left the memories of the war behind, too.
After Lily sings her song she introduces the piano player who starts to play Chopin's Polonaise in A-flat Major, Op 53 - "Heroic". The piano player, Reed Smith, is portrayed by actor William Schallert, who was also a composer, pianist, and singer.
The piano player ends the episode playing Frederic Chopin's "Impromptu no. 4."