Davis (Steve Zahn) concocts a remedy for the post-Mardi Gras blues; Annie makes a decision that Sonny takes personally; Janette’s (Kim Dickens) latest chef’s gig gets bogged down; Antoine (Wendell Pierce) becomes LaDonna’s unexpected benefactor; Colson (David Morse) warns Albert to avoid trouble on St. Joseph’s night; Creighton is inspired by a classic novel set in old New Orleans.