A former prison warden enlists the help of Walter to find a bullet that could prove the innocence of a death row inmate just days before his execution. Meanwhile, FBI psychologist - and Jeffersonian team member - Dr. Lance Sweets evaluates Walter's competency to consult on federal cases. In the process, Sweets begins to understand Walter's intangible gift and motivation to find the unfindable. Also, Willa attends a beach party and gets herself into trouble.

A NASA scientist seeks Walter's help to find the matching pair of a red stiletto left behind by a woman he met at a bar. Walter uses the stiletto as the first clue to finding the missing woman but in the process he uncovers her shocking secret that winds up putting his own life in danger. Meanwhile, Willa exposes Leo's dark family secret, but when she tries to make amends with him, she gets herself into even more legal trouble.

Isabel's new boyfriend Frank, an all-star baseball athlete, gets robbed, and Walter steps in to help find his stolen collectibles. But in the process, Walter learns Frank has lost something more meaningful than memorabilia. Then, to earn Willa's trust, Leo and Walter bring her in on the case.

Dr. Jack Hodgins from the Jeffersonian team seeks Walter's help to find evidence that could expose extraterrestrial activity. Meanwhile, Timo and Willa struggle with their arranged marriage proclaimed by the head of their gypsy family.

While a hurricane rages in Southern Florida, Walter helps Isabel find a missing high school girl from Ends of the Earth; the weather forces Willa's probation officer to hole up at the bar.

When new tracks are leaked from late rapper J-Stryke, music mogul Big Glade and his business savvy lawyer, Leo's former love interest, ask Walter to find the source of the illegally released music. As Walter pieces together the events that led to J-Stryke's death, he uncovers a more complicated history.

Joe and Annie, a once-happily married couple, ate at The Bella Plata restaurant every year on their anniversary until mob boss Fico Vasquez closed it down. Now, to save his marriage, Joe asks Walter to help him find the meal over which he and his wife first fell in love.