Fox have provided two previews to the new episode of "Prison Break" season 4. The fifth episode called "Safe and Sound" will see Wyatt coming to kill Michael and Sara and also Agent Self getting involved in the action.
Meanwhile, the search for the card continues. This time, Michael and Lincoln are drawn to the Treasury Department when hunting for the next key card holder. The episode will air on Fox on Monday, September 22 at 9:00 P.M.
Recently, Michael Ausiello from EW spilled that the fourth season could be the last for the series. "There's a shelf life to serialized dramas. If this is the last season, we're not mourning that because it's been a great ride and we have a great season (ahead)," executive producer Matt Olmstead said, adding that there will be enough time to "prepare for an appropriate ending."