A Sandman Link takes over the bodies of everyday people when they sleep and has them act out their wildest subconscious fantasies. Kate falls asleep while quarantining an area and the Sandman enters her. Kate becomes dangerous under the Sandman's attraction and the team must destroy it before it's too late for Kate.

A fabulously wealthy - and beautiful - cosmetics executive is Nick and Kate's key suspect after a 19-year-old male model is found mysteriously dead of old age. Using Nick as bait, the SU2 detectives must prove the glamorous tycoon is a witch who has lived for centuries by literally sucking the youth out of her victims to keep herself young.

Nick and Kate must stop the execution of a boy's father who has been wrongfully convicted of a murder committed by an invisible Boogeyman Link.

A Link so monumentally evil that his name has been lost to history reappears on Halloween, the one night of the year when Links can roam with impunity. The confrontation between the Link and Nick is made all the more personal - and lethal - as it is the villain responsible for the death of Nick's former partner. The mysterious Link is bringing the corpses of serial killers back to life so they can carry out his plan to assume leadership of all Links.

When Kate kills Medusa's sister, Medusa exacts vengeance by striking out at Kate's boyfriend; Nick skirmishes with the Gorgon, and Kate must race to find an antidote before her partner turns to stone.

A series of gruesome murders leads Nick and Kate to suspect that Jack the Ripper has returned from the grave... and is stalking victims in Chicago.

The Djinn, a Link who makes dreams come true, but at a price, is on the loose in Chicago. If she can grant four wishes to four different masters, she will gain power to enslave the city. Now it's up to Nick, Kate and rest of Special Unit 2 to prevent her from granting her last wish.