In Plain Sight Episode 4.09 The Rolling Stones

It's a story as old as time, or at least as old as the story of Cain and Abel: two brothers turn out as different as can be, and can't seem to find a way to get along. Throw in a connection to an inter-state fraud operation, an FBI bust, and a subsequent relocation to Albuquerque, and you've got family drama of Biblical proportions.

Meet George and Billy Stone. George is fastidious, Billy is fast-living. George is upstanding and responsible. Billy is... a mess. And now, thanks to Billy's involvement with some unsavory counterfeiters and a case of mistaken identity, both brothers have been dropped in Mary and Marshall's backyard. Billy adores his brother and is desperate to stay together; George's feelings towards his ne'er-do-well younger sibling are less warm. Even if Mary and Marshall can keep the brothers from killing each other, they've still got the angry thugs back in California to worry about.

As the WitSec team keeps the brothers from doing anything rash, Mary continues to deal with the reality of her pregnancy. And though frustrated by the limitations her pregnancy creates at work, she finds support from a surprising source: her family.