Plot summary
In the series finale, Kyle gets Cassidy to open up about Latnok's plans for the future of Adam Baylin's experiment. To his horror, Kyle learns that the secret society is going ahead with a production of multiple clones of Kyle. Kyle and Jessi must find a way to put a stop to it, and he enlists the help of the Tragers, Declan, and Amanda. But with the world thinking Jessi is dead, and Kyle trying to keep up with all the lies he has told, Kyle then finds that Cassidy is his own brother.
Credits
Adapted from Wikipedia contributors, List of Kyle XY episodes. HTML formatting and reference markers removed.