"Chicago, April 1920" is the name of the first half of the double-length episode Young Indiana Jones and the Mystery of the Blues. While Mystery of the Blues was broadcast as a single episode in the United States and several other countries, it was separated into two one-hour episodes for broadcast in the United Kingdom: Chicago, April 1920" and "Chicago, May 1920". These bookend scenes were not the same as the scenes used in the continuous showing of Mystery of the Blues, involving Indy (played by Harrison Ford) and Greycloud in 1950.