While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose.

When an irate Grant, Ty’s travel buddy shows up at Heartland to punch out Ty for “kissing Blair” the disclosure puts Ty and Amy’s relationship in jeopardy. Meanwhile finding out…

Amy tries to pretend that nothing has changed when Ty returns to Heartland with a surprise guest.

The Winchester brothers seek the help of their family friend Bobby while investigating a series of unexplained happenings on a local college campus.