A teenager is found disoriented in the middle of traffic and taken to a detention facility. Later, Nicole Trager, a psychologist, comes to examine him, and takes him home. He gets on the bad side of both Trager kids, Josh and Lori, and annoys Stephen, Nicole's husband. But one by one, Kyle influences them to accept him.

The Petersons, Kyle's real parents, arrive to take him home, but Kyle is skeptical about his biological ties, so he turns to Tom Foss for answers. Meanwhile, Steven has trouble accepting that Kyle may be leaving.

After an unusual hypnosis session, Kyle is determined to unlock his memory, so he accompanies Lori and Declan to the University of Washington to search for clues about the missing Professor Kern and how his relationship ties in with Kyle.

Kyle, Lori and Josh experience difficulties on the first day of school while Nicole and Stephen receive a visit from Tom Foss.

Lori, Kyle, Jessi, Declan and Amanda stumble upon the ruins of Zzyzx while on a camping trip in the woods. Andy shares a life-changing secret with Josh.

What Jessi and Kyle find in Cassidy's safe sends them searching for the truth about Sarah Emerson, but Jessi's unrelenting method may endanger her life. At home, Declan finally puts his foot down, and Josh already misses Andy.

Kyle risks losing Cassidy's trust when he begins a deception aimed at discovering Latnok's true purpose, and Jessi, devastated by their discovery, has a hard time putting aside her emotions. Elsewhere, Josh plans a perfect farewell for Andy.

Kyle attempts to figure his emotions and sudden attraction to next door neighbor Amanda, while Lori and Josh are also experiencing love pains of their own.

Kyle becomes frustrated when he experiences his first brief flashes of memory, and he ultimately finds comfort from Amanda. It's the day of Lori's birthday, but she's not excited about it while Kyle on the other hand, wishes he even knew the date of his birthday.

Kyle discovers that he has the ability to read lips and listen to distant conversations, so he recruits Declan and uses the newfound abilities to investigate Tom Foss. Meanwhile, Josh stresses over his grades. Amanda's boyfriend has a terrible secret.

Kyle, Declan and Foss plot to retrieve Kyle's Latnok ring. Meanwhile, Lori begins to question Stephen's time at Madacorp.

Kyle breaks quarantine to find Jessi and they use the photo from Baylin's lock box to search for answers. Meanwhile, the Trager's sort through all that they know about Kyle in order to make sense of who he really is.

Kyle encounters the concept of time and wonders why those around him focus on it. In an attempt to tire out Kyle, his family subjects him to running, sleeping pills and other activities. Josh suspects that Kyle may be an alien.

Kyle links his memory to a missing professor, but finds a welcome distraction when he joins the basketball team. Meanwhile, Nicole gains a better understanding of Kyle's unique situation.

Kyle believes he can predict the future after having multiple visions, which all come true. Hedelves deeper into Baylin's research hoping to find an answer.

Believing Jessi is dead, Kyle returns to the Tragers and reveals the truth about Madacorp. He's now determined to take down MadaCorp and destroy all the information they have on Zzyzx.

The teens scramble to make their prom night as perfect as possible, and Jessi makes a surprise announcement regarding her relationship with Sarah.

Nicole has things to attend to, so other members of the family have to babysit Kyle, who's having trouble processing the little white lies that his family tell. Meanwhile, Steven learns that he'll have to lay off employees & Amanda freaks out over a fender bender.

As Kyle and Amanda prepare for their first date, a cryptic warning about Tom Foss makes Kyle wonder whom he can trust. Meanwhile, Jessi chafes at Emily's restrictions.

Kyle begins having cognitive malfunctions and is drawing pictures in his sleep due to the attention demands from the other students during his midterm exams. Meanwhile, Kyle's condition has Jessi creating her own tutoring service.

Sarah asks Kyle to intervene with Jessi, but his method may prove disastrous; Brian Taylor hits a wall in his quest for Latnok's approval, and the prom has a serious cash-flow problem.

With Adam Baylin's help, Kyle begins to realize the truth behind his existence but soon finds himself back at the Trager's house under the training of Tom Foss.

Kyle's attempts to return to a normal life at the Trager's house is complicated by Tom Foss' training. Meanwhile, Jessi (XX) begins her mission to get close to Kyle.

Coming back to work, Nicole has a startling new patient: Jessi. Jessi was recommended by her "sister," Emily, because Jessi supposedly had a rough childhood. Meanwhile, Kyle's on a mission to find Amanda's stolen bracelet.

An out-of-control and missing Jessi increases tensions within the Trager household, forcing Nicole to institute precautionary measures.