TV Guide: Matt's Picks: April 18-21

Bones (Thursday, 9/8c, Fox)Why are Booth and Bones in Florida this week? Welcome to the time-honored TV tradition of the "backdoor pilot." This week's case involves the murder of an Everglades maritime museum guard amid an attempt to steal a 17th century treasure map. They enlist the help of Booth's Iraq War comrade Walter Sherman (Geoff Stults), a well-renowned "finder" — sounds like a