It's off to Cuba for Hank and Evan this Thursday night on Royal Pains.

In order to research gene therapy, the brothers will take Boris' private plane to this country and... well, we can't reveal what happens from there.

On the home front, though, we can say that Divya will have issues with Hank's replacement. Check out a few stills below from "Medusa," followed by the official USA Network preview of the episode:

[video url="http://www.tvfanatic.com/videos/medusa-promo/" title="Medusa Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.