Stewie Griffin, the youngest member of the Family Guy clan, makes a very unique appearance on Bones Thursday, May 7 (8:00-9:00 PM ET/PT) on FOX.

In "The Critic in the Cabernet" episode, Brennan (Emily Deschanel) decides she wants to have a baby and surprises Booth (David Boreanaz) with a request to father her child. Brennan's request dredges up a host of unspoken feelings and unresolved issues between the two, and Booth becomes consumed by the prospect of having a child. The stress of the situation, coupled with Booth's undiagnosed health issue, paves the way for a surprise visit from Stewie. The diabolically clever baby assesses the situation and offers advice in his inimitable style.

After returning from the "Bones" set, Griffin remarked on the experience of playing his first dramatic role: "Oh, have you seen it? Was I good? Because I heard they said I was amazing and they want me to replace Emily, but that's just a rumor."

"The guy was good during the actual scenes, which is the important thing," Boreanaz commented. "But between takes he literally vanished nowhere to be seen. I guess it's true that Brits and cartoons tend to be standoff-ish. Or maybe it was a method thing, I don't know."