Alan Ladd is Dan Holiday, the mystery writer who plays detective to get story material, in Box 13. The syndicated series found Holiday soliciting danger with an ad offering himself as an adventurer for hire – one who would "go anywhere, do anything." Answering those letters addressed to Box 13 meant Holiday could be volunteering to put a target on his back or to solve an impossible crime. We'll hear Ladd in "Much Too Lucky" and "The Perfect Crime."