[1] Shows broadcast by Radio Classics include The Jack Benny Program, Abbott & Costello, Gunsmoke, The Mysterious Traveler, and The Shadow.

Hard-boiled noir detectives such as Philip Marlowe, Richard Diamond, and Johnny Dollar are also featured.

[2] Shows are played in two-hour blocks of programming which are rotated in different time slots during the week.

Commercials and Sirius XM promos are played before, after and during the old radio shows, though the amount of advertising time does not exceed eight minutes per hour.

Prior to February 1, 2009 XM and Sirius had separate Radio Classics channels, with different programming on each.