A Korean War vet named Paxton Petty is sent to Alcatraz after setting out multiple land mines around the San Francisco area. His motive? Revenge for not getting a medal after the war. All but the last of his mines has been found and it's a case Hauser has been trying to solve since he was a baby-faced cop. When Petty shows up in the present day, he picks up right where he left off. Thanks to Lucy's interrogation techniques back in 1960, they know that Petty mentions the location of his mines in old song lyrics. Hauser sends Doc and Rebecca to what he figures will be Petty's third target, while he himself confronts Petty at his more imminent target. Hauser manages to step on one of Petty's mines, but has the presence of mind not to step off of it. He ends up stuck there for hours, not able to move his foot off the trigger mechanism.
Meanwhile, Rebecca and Doc catch Petty when he finally shows up at that third target. He says he'll give up Hauser's location in exchange for information. It turns out that Petty has no idea why or how he was brought to 2012. For him, it feels like only a week has passed. They have no info for him, but Rebecca figures out where Hauser is, anyway. Hauser is saved, but a cute and fun bomb squad guy dies in his place. Boo! Hauser shoots Petty in the leg and gets the location of that old, final land mine. In the end, Hauser goes to visit a still-comatose Lucy in the hospital. Since the modern-day docs aren't helping her any, he snatches her up and brings her to Dr. Beauregard in the forest prison. Stay tuned for the full weecap.
Alcatraz, 1960. Hauser and another guard arrive on the island with a fresh inmate. Warden James and Dr. Lucy Sengupta are at the dock to meet them. Hauser is instantly smitten at the sight of Lucy. At this point in history, he looks several years younger than her. Warden James says, in his usual poetic drawl, "Mr. Petty, you arrive to us with much fanfare." He calls this Mr. Petty a "special case," warranting such a quick meeting. Mr. Petty looks pretty young. Indeed, when he smirks, Warden James makes a comment about the smiles of children, although his, as the Warden says, is "all the company of Hades." Apparently, Petty has left several mines around the mainland, which Warden James promises they will find. When the Warden and the doctor turn away to take Petty to his cell, Hauser stammers out, "Does -- does the lady need a ride back to the mainland?" She declines the invitation, but offers him a peppermint, which affords her the opportunity to touch his hand. He reacts like he just got to second base.
Present day. The cranky, old version of Hauser waits by Lucy's hospital bedside. Unlike him, she hasn't aged in 50 years. She's still in a coma, and a doctor comes in to say there hasn't been any improvement. The doc asks if Lucy ever mentioned a "DNR." "Are you saying she's dying?" Hauser asks. Instead of answering, the doc just touches his shoulder and leaves. Guess she didn't want to hear an answer about that DNR.
At a place called Pine Street Park, a man lets his dog loose to frolic. Man, that is one adorable dog. He looks like he's part dachshund, part floor mop. The man follows after his dog. Suddenly, an explosion goes off under his feet, blowing off one of his legs. Other explosions go off. People scatter, screaming. I hope the dog is okay.
Later, Rebecca and Doc arrive on the scene. Holy hell, what is she wearing? Rust-red pants, olive green shirt and orange jacket. It's like she shops at the "Woodland Nymph" section of JC Penney. With her keen sprite senses, she notices a young man with a backpack. Hauser is already waiting for them. Doc gets a look at the devastation and realizes land mines were used. He goes, "Holy crap! It's Paxton Petty!" Hauser predicts there will be more incidents to come. Back in the day, Petty hid four mines in the area, although only three were ever found. Hauser goes off to do his thing while Doc regales Rebecca with exposition about Petty. He was a Korean War vet who was court-martialed on suspicion of killing Korean schoolchildren. During the investigation, he worked "graveyard detail" at the Presidio. After that, he did his whole land mine thing around the city and then got sent to Alcatraz. Doc hands Rebecca his tablet computer. She recognizes Petty as the young man she saw just moments earlier.