Leverage has landed a Mad Men for one episode this summer.

Michael Gladis, best known for his three season stint as Paul Kinsey Mad Men, will guest star on the TNT hit as Reed Rockwall, a ruthless public relations expert in crisis management.

As first reported by TV Guide, Timothy Hutton's Nate will be at the center of one of Rockwall's schemes when a victim turns to him for help.

Leverage premieres its fourth season on June 26 and Gladis - who also recently appeared on Medium and The Good Wife - will come on board the third episode, which is titled "The 15 Minute Job."