In this new clip from "Rogue Time," tonight's episode of "The Flash," Leonard "Captain Cold" Snart's little sister Lisa joins the Rogues for a new caper.

The clip finds Leonard (Wentworth Miller) and Lisa (Peyton List) making an entrance at a casino where they are decidedly unwelcome. As they wreak havoc for the casino owners, Barry Allen (Grant Gustin) arrives as the Flash to put an end to their mayhem.

"The Flash" airs Tuesdays at 8 pm EST on The CW.