Elliot and Turk are down in the dumps because their parents, Lily and Spencer Reid and Martha Turk are coming to see them present their joint paper on peripheral vascular disease at a medical conference. J.D. half-heartedly sympathizes with them, until his own father Sam Dorian shows up. J.D. ends up in a funk like the rest of them. Sam Dorian is crude, lewd and almost always rude. But later, J.D. realizes he is just a middle-aged, lonely guy. Elliot's parents are insensitive and cold and Turk's mom is a take-charge matriarch. Amazingly, the longer the parents are in town, the more agitated the interns become. J.D. desperately wants his father to show some interest in his medical career and Elliot needs to show her father that she's got the smarts to be a great doctor. Turk hesitates to introduce Carla to his mother, but when he does the two women in his life actually get along great. Too great actually, it turns out that Carla is just like his mother.