Ken Wilder

Phoebe believes that the cat that jumped into her guitar case in Central Perk contains the spirit of her adoptive mom. Joey's attempt to sell his entertainment center proves hazardous. (Original Broadcast: Season 4, Episode 2)

When Dr. Sebastian Charles (guest star Ron Livingston, "Little Black Book," "Sex and the City"), renowned physician and head of an international organization to fight the spread of tuberculosis among the poor in Africa, is rushed to Princeton Plainsboro Teaching Hospital after collapsing, he immediately determines all the symptoms are from TB. Dr. House has a different opinion and requests additional tests to help determine the cause of his illness.

Doug is way out of his league in an English literature adult education class that Carrie talks him into taking.

The BAU heads to Austin to investigate victims found there with their watches set inaccurately, a clue which may connect the crimes.

When extremely educated new intern Dr. Oliver Wells (guest star Brian Klugman) starts working at the Jeffersonian, his quick-learning, enthusiastic personality challenges Brennan as he gets under her skin with his eccentric but undeniable observations, causing her to try to be more open-minded about many scientific questions. Meanwhile, Booth worries she may have gone too far when she accepts the possibility of time travel as a factor in a murder investigation.