Eureka S3 Ep 10 - F2F Transformations

Season 3 Episode 10 Your Face or Mine
Jo goes to Julia's lab and finds that Julia now looks exactly like her. Julia apologizes, saying she just wanted to know what it was like to be Jo for a day. Unfortunately, the DNA strands are unstable, and Julia doesn't know how to reverse the process. Jo tries to put Julia under arrest but doubles over as the pills Julia gave her after re-certification kick-in. Jo wakes up to find herself in custody, now looking just like Julia. Julia (who looks like Jo) is claiming that she is Jo and Jo is Julia. Allison says they are going to decide what to do with Fake Julia and they leave. Despite being in worse shape, Julia risks her life to fix Jo first. In the end both of them are put back to normal.