In the back of the truck, Ted tells Robin what to say to make things right with Liz, but Robin makes up a fake go-to-extremes e-mail instead, that's all, "Ted is extremely handsome, but really violent. He's really rich, but lacks bladder control." They go over a bump and she accidentally hits send, but she's sure "everyone" will get that it's a joke. He's like, "Everyone?" In the front, Barney, Lily and Marshall laugh about "really rich." Because that's what's most ridiculous.
They all arrive at Sam Gibbs' house and walk to the front yard. Barney's all, "No big deal; my dad doesn't live here." But just as Wayne's about to knock, Barney stops him and admits he knows Bob Barker's not his dad. "I'm not crazy. I just needed that." The music gets all sad as he says that having a celebrity dad made him feel special, but Wayne's right that it's time to grow up. Wayne and Barney hug as everyone else watches. Wayne rings the door bell and a black man answers. [In fact, it's Ben Vereen. - Zach] Wayne tells him his mother is Loretta Stinson, and Sam's face shows us he did know her -- in the biblical sense. Wayne gives Sam the photo, and Sam's like, "You're my son." They hug and Barney watches. Lily and Marshall talk about how tough this must be for Barney, but then Barney yells, "Papa!" and joins the Sam-Wayne hug.
Wayne clearly cannot believe his brother is this stupid. But Barney has them all posing as if for picture, saying it's "like three of the same guy." And now Barney gets why he was always so awesome at basketball. "Guys, I'm black!" He runs to get his camera, and Wayne explains that Barney's clearly not taking it so well that he didn't meet his real dad today. Sam says he only knew Loretta for a couple months, and when he found out about Wayne three years later, Loretta made it clear she didn't want him in Wayne's life, but he always wanted to meet him. Ted's like, "Wait. Sam only knew Loretta for a couple of months. Barney and Wayne are two years apart. Sam couldn't possibly be Barney's father." Robin sends Liz a pretend text: "He's also quite the detective."
Marshall suggests that they let Barney believe Sam's his father for today, since he's already been through a lot. "Can't we just let the guy be black for a day?" Barney comes back with his camera and asks Ted to capture the moment. Barney's like, "Man, I thought I was a light-skinned Caucasian. But in truth, I'm a really light-skinned African American." Then he talks about how hard it is, as a black man, to hail a cab in New York. They all go inside, where Sam and Wayne play piano and sing Stand By Me. Barney gets up and tries to sing along with them, but he's clearly off from their rhythm, so Lily keeps dragging him away.