Der Komet
Caldwell wrote and performed songs for the movies "Back to School" ("Educated Girl"), "Mac and Me" ("Take Me, I'll Follow You"), "Salsa" ("Puerto Rico") and its sequel ("Every Teardrop"). He also recorded a song for the 1984 film Night of the Comet ("Never Give Up"). Due to what he has cited in interviews as a lower cost of use than the original recordings, his versions of big band standards have appeared in several films. Examples include "Simone" (2001) and "Lake Boat" (2002).