Fort Marshall prepares to welcome military dignitaries (guest stars Dr. Joseph Westphal, General George Casey, Sheila Casey) for their centennial celebration. Hector and Gloria deal with the repercussions of Penny's return. Roxy and Trevor worry over the health of their babies.
Bobby confides in best friend Lydia that he thinks he's fallen in love with Charlie; Sam and Lucy agree to meet and make up over the cheating accusations against Mario.
The body of an $80-million Florida state lottery winner is found murdered on a remote island in Islandia, and Jim and Jennifer must unravel a personal vendetta spanning over a decade between the victim and the island's only resident. Miranda pulls Callie away from her studies to have some fun at a medical sales mixer, but Jim starts to find Callie harder and harder to reach in Atlanta.
Gunnar and Sinbad are ambushed by the Khaima, a band of warriors, who avenge injustice. Their leader, Obsidian, sentences Gunnar to death for his brutal Viking past. Taryn creates a magical Stalker, which hunts down Sinbad at the Khaima campjust as Obsidian is about to kill Sinbad and Gunnar. The Khaima slash at the Stalker, but it repairs itself. As Gunnar urges, Sinbad defeats the Stalker by mastering his anger. Obsidian pardons Gunnar and invites him to join the Khaima, but Gunnar declines.
Alex hauls a high-priced load down a dangerous one-lane road; Austin struggles with heavy cargo; Hugh helps a rookie driver who runs into trouble on the ice.
A couple's home is packed due to their hoarding and they face the real threat of eviction unless they can clean up and fix all the damage caused by their out of control collecting.
T.J. recounts the events that lead up to his suicide attempt while dealing with his family's lack of interest in his club opening. Douglas struggles to cope with his betrayal and meanwhile, Elaine has a diplomatic crisis on her hands upon her return from overseas.
CeCe is invited to a funeral which she thinks is her surprise birthday party. The gang meets Deuce's identical cousin, Harrison, and Rocky falls for him.
The Enchantress offers Loki a chance to exact his revenge on Thor and the Avengers for thwarting his conquest of the Nine Realms, and uses a spell to strip Thor, Captain America, and Iron Man of their powers. Now, the helpless heroes must defeat Loki - his soul now in command of a powerful Asgardian weapon known as the Destroyer - without their abilities.
Ben goes on holiday with his parents, but the holiday is thrown off track when Gaston accidentally swallows the car keys!
A player has been killed inside a safe zone and not by the known means. Asuna and Krito take it upon themselves to find out how and why this is happening.
The Aqua Somethings must assemble and pilot an ancient, giant robot to defeat an old foe.
The Leverage team takes down a wealthy scientist who stole his former research partner's discovery and ruined his reputation. Their tactic is to convince him he's made first contact with aliens..
Lazarus digs deeper when an anonymous Good Samaritan who helped him save a boy from a burning building disappears. Meanwhile, Tonya and Ahmad work undercover on a drug deal, and Kenny and Jackpot find themselves trapped by a live alligator.
Kenny and Ahmad investigate when a bodega owner shoots two men accused of kidnapping his daughter. Meanwhile, recent muggings at a local prep school hit close to home for Lazarus, and White House and Jackpot escort an injured prisoner to the hospital.
Just two months after her wedding, a bride disappears on Christmas Eve and the groom leads the search.
Dilys tries her best to help her "little treasure" Norman get his Pontypandy pioneer fishing badge, with disastrous results.
Brain surgery creates a perfect amnesiac who can't remember his own life from day to day. A scientist goes to extremes to prove his theory and save lives. A tiny slip while testing the core of an A-bomb releases a blast of radiation.