When the Skrulls start invading the city, the Super Hero Squad must team up with the Fantastic Four to stop them. Meanwhile, Thanos forms an alliance with Dr. Doom so he can steal an alien artifact from the Baxter Building.
Lady Catrina and her strange servant Jonas arrive in Camelot, where they are welcome to stay by a most delighted king Uther, who becomes captivated by his latest guest. Arthur, on the contrary, far from sharing his father's enthusiasm and in the sight of the flirting going on, is pretty appalled with the situation. Merlin and Gaius have the feeling that she is not what she seems and their suspicions are proven true when Merlin discovers that Lady Catrina is a troll and that unfortunately, her intentions are far beyond the prize of a king's heart. Horrified, he reveals the truth to Arthur, who doesn't believe him. Merlin embarks in the task of proving the real nature of the woman while at the same time saving Uther from ruin and Camelot from fall. Will the young warlock be able to overcome the powerful magic of the troll before it's too late?
Candace hopes to join the Fireside Girls before the Paisley Sideburn Brothers perform.
The Flying Dutchman turns SpongeBob and Patrick into ghosts.
Candace feels depressed when Jeremy cancels their date, and Phineas and Ferb try to cheer her up. Meanwhile, Perry is accused of committing bad deeds and must attempt to clear his name.
Maya is ticked off at D for hooking up with another girl in the gym. Sophie and Avi team up to assure Giancarlo about the Vertex purchase. The Bella, Cassia, & Andre hook up has unexpected consequences.
Eve's powers grow out of control, catching everyone in her endless sinister games.
Betty tries to get a scoop with Gucci's new designer, Evan York, through Hilda's customer, Sammy. Marc tries to stop her by getting Amanda and Matt to stage a showdown at Ignacio's restaurant. Daniel goes to a bereavement group and meets Natalie who shows him an interesting night. Wilhelmina flies to Bermuda to try and find Connor.
When Justin completes his ten-thousandth spell, he signs up for a Monster Hunting class.
When Madge's estranged daughter Valda appears at The Solana, Madge is convinced she is after Mel's money. Meanwhile a cockney conman called Gary starts working his way through the holidaymakers, and Madge is given something to settle her stomach with extremely unsettling results.
Melinda help Eli with a patient who is being haunted by his sister. Meanwhile, Jim and Melinda have concerns over something Aiden has been seeing.
Time is running out for Jeremy as Elena and Gail's marriage is imminent. However, he thinks there may be a way to get Gail off the scene and win Elena back. Meanwhile Mark, although conflicted about becoming a father, is worried that Jeff is becoming a potential rival dad. He decides that he's going to learn to drive so that he can take Sophie to the hospital when the baby arrives. Sophie is delighted, but learning to drive doesn't prove that easy.
The team attempts to find the daughter of a geneticist who they suspect was kidnapped by the unstable mother. However, they become concerned about the case when they find evidence that suggests the young girl was a clone. Meanwhile, Charlie and Amita discuss having kids and Liz reveals a dark secret.
A doctor who performs late-term abortions is murdered in church. The case falls apart for Cutter when Rubirosa is touched by an abortion nurse's testimony.
When Sharona returns to San Francisco to handle legal issues related to an uncle's death, Monk suspects foul play and finds himself torn between the differing styles of Sharona and Natalie.
When the trail of elusive criminal "The Dutchman" dead ends, FBI Agent Peter Burke teams up with a most unlikely partner to catch him - the imprisoned Neal Caffrey.
With chaos all around them, the team must come to terms with how to rebuild after the Cabal’s attacks. Magnus takes a methodical approach to prove Ashley is still alive, while Will and Henry take on the daunting task of processing the hundreds of Abnormals who now seek refuge at the Sanctuary.