Stewie Griffin, the potty-mouthed baby from Fox’s animated hit “Family Guy,” is about to show up in an unexpected place – the network’s live-action series “Bones.”

The rom-com/forensic procedural will feature the toddler (voiced by Seth MacFarlane) in a special guest appearance on this week’s episode, which airs 8 p.m. Thursday on Fox and 9 p.m. Wednesday on Global in Canada.

Look for Stewie to pop up in a hallucination that FBI Agent Seely Booth (David Boreanaz) has after his forensic pathologist partner, Temperance “Bones” Brennan (Emily Deschanel), makes an unusual request of him.

Click here to view a promotional clip for the episode.

And the special guests keep coming – next week’s season four finale sees Motley Crue invading Bones’ lab after a murder victim is found in a nightclub the band is playing.

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