Photo Coverage: Covert Affairs 'LET'S DANCE' Tonight, September 18 on USA!

Piper Perabo -- (Photo by: Steve Wilkie/USA Network)

(l-r) Christopher Gorham as Auggie Anderson, Piper Perabo as Annie Walker -- (Photo by: Steve Wilkie/USA Network)

Christopher Gorham as Auggie Anderson -- (Photo by: Steve Wilkie/USA Network)

Peter Gallagher as Arthur Campbell -- (Photo by: Steve Wilkie/USA Network)

Kari Matchett as Joan Campbell -- (Photo by: Steve Wilkie/USA Network)

Piper Perabo as Annie Walker -- (Photo by: Steve Wilkie/USA Network)

(l-r) Peter Gallagher as Arthur Campbell, Kari Matchett as Joan Campbell -- (Photo by: Steve Wilkie/USA Network)

(l-r) Peter Gallagher as Arthur Campbell, Kari Matchett as Joan Campbell, Piper Perabo as Annie Walker -- (Photo by: Steve Wilkie/USA Network)

Piper Perabo as Annie Walker -- (Photo by: Steve Wilkie/USA Network)