Richard Leonard directed scripts by Barbara Bates, Stedman Coles, Frank Hummert, Lawrence Klee and Bob Shaw. James Fleming and Larry Elliott were the announcers. Al Rickey's band provided the background music, including the program's theme, "Someday I'll Find You."

Answer this question based on the passage: mr keen tracer of lost persons theme song? Let's have some stream of consciousness first.
The important part for answering this question is: Al Rickey's band provided the background music, including the program's theme, "Someday I'll Find You." So, the answer is Someday I 'll Find You.