When a million dollar casino heist takes a deadly turn, Riggs befriends the only credible witness, an eight-year-old boy, and takes him into his care. Murtaugh pulls some dangerous stunts…

Caroline tries to fit in with Max and the diner gang as they go out to get wild and crazy at the St. Patrick’s Day parade, but finds herself longing…

Darlene is in for one surprise after another when David introduces his girlfriend, Blue, at a parent-teacher conference and mentions that Mark and Harris will be spending the weekend with…

When the Jeffersonian team discovers remains of a victim, and elements of the crime scene point to a possible protege of serial killer Christopher Pelant, they must revisit their prior…

Penny tries to seduce an abstaining Leonard to ruin his “donation” for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali’s canceled bachelor party…

When his inflated ego lands him in hot water, Colt realizes he’s not the big man on campus anymore. Beau’s doctor makes him trade in steak for salad.

Gloria, Claire, Haley, Alex, Lily, Luke and Manny are equally committed to showing their support for gender equality and the women’s movement in very different ways. Meanwhile, Jay and Phil…