Christy and Bonnie set aside their differences to deal with a family crisis together.
Duncan promises to kill a member of Ellen's family when she refuses to assassinate the president during surgery. Duncan also informs the family to go about their normal lives for the next two weeks until the commander in chief's operation.
Mrs Tishell returns to the village. Martin has to work out what is wrong with beach comber Lorna. Al and Morwenna have an internet dating disaster, and romance is blossoming for Bert and Jennifer.
The owner of the SS Keewatin, Clarence MacFarlane, receives a threat and Detective Murdoch and Inspector Brackenreid board to investigate. About to sail on its maiden voyage bound for Rochester, New York, Murdoch wants to stay aboard after he learns that Julia is one of the guests on board for the maiden voyage. Their investigation uncovers a real threat to the ship.
Another soldier in the army of evil, the Sandman, seeps into the dreams of the residents of Sleepy Hollow. By infiltrating their minds at night, he tortures them to the brink - all because they, at one time, turned a blind eye to justice. When the Sandman seemingly sets his sights on Abbie, she is forced to begin to face her past - and her institutionalized sister Jenny. With Ichabod by her side, and her life at stake, the duo must try to defeat the Sandman and continue their fight against evil.
Skits include Worst Babysitter Ever: Lost; Eating in the Library Prank; and Swag Master J: Video Games.
Gus and Pizza Steve have plans to go out for the night, but UG can't be left alone in the RV, so they need a babysitter. But when none are available, they turn to UG to babysit himself.
Joanna and Adriana try to reconcile; Elsa comes home from the hospital; the sex therapist assigns Joanna and Romain homework; Alexia and Peter try to work through their issues.
Ceaser and Dutchess are missing in action and the lights are out (literally) at Black Ink! O'S**t has a "dope-ass" tattoo to do for a loyal client and is psyched to make some much-needed "lawyer money." When the electric company arrives and pulls the power because Cease hasn't paid the bill, the crew can't work and they are forced to close the shop. O'S**t gets some tough love from his bail bondsmen on the impending consequences of him not taking his legal troubles seriously.
The feuds within the pack escalate when student elections are held, putting them all at risk.
Richard looks at DIY, including robot lawnmowers, the world's safest saw, an automatic wallpapering machine and the latest 3D printers capable of making plates and cutlery in minutes. Richard is not a fan of doing it yourself and believes that gadgets should be able to do all the work for you. So he tests the latest safety tools, building machinery and lawnmowers, all of which promise to take the strain and pain out of decorating your home. He also sets himself a challenge: to makeover a room in his house using robots and gadgets and without him having to lift a finger.
An eccentric seller in North Bay attaches his collection to the outside of his home; Brooke and Jerry hold their first sale at the Warehouse
When Lily discovers Ted’s list of things he wants to do in New York before he moves for Chicago, she becomes frustrated that she is the only person who knows about his plans. Meanwhile, Robin and Barney realize they have very little time together before their relatives arrive for their wedding.
Continuing from the season premiere episode, Beckett races against time to find a stolen toxin capable of killing tens of thousands of people. To make matters worse, Castle was exposed, leaving him with less than 24 hours to live.
Red and Liz go under cover to stop an assassin known as The Freelancer from killing his next target; Ressler and a recently re-hired CIA agent try to protect Red from a distance; Liz wonders what she should do about Tom and the mysterious box.
When In Hye undergoes septic shock, her near-death experience gives her a new perspective on things. Another person from Shi On's past makes an appearance.
A 7-year-old girl contracts the bubonic plague and suffers a 107 fever, vomiting, painful buboes, and seizures; a yoga instructor finds out that what she thought was influenza is actually necrotizing fasciitis caused by Streptococcus intermedius and Peptostreptococcus; a state wrestling champion contracts angiostrongyliasis.
On a snow and icy day, Mr. Porter's van ends up sliding on ice. If the ice cracks, it will fall into the bottom of the bay, and inside of the truck has all the pups' treats and food in it!