Ernie Grunwald

When Chandler jokingly posts an outrageous biography about Ross on Ross' college alumni Web site, Ross retaliates by finding Chandler's alumni site and doing the same about Chandler. An Internet war between the two friends ensues. Meanwhile, Monica gets extremely vigilant after weak-willed Phoebe asks for help in preventing her from contacting Mike (recurring guest star Paul Rudd) after their relationship ends.

The body of a man with a white beard and a tailor-made Santa costume is discovered in the sewer near a D.C. mall just three days before Christmas. As the team gathers forensic evidence, the victim seems to match the legend more closely each step of the way. Booth and Brennan discover the man, whose legal name was Kristopher Kringle, was a well respected Santa Claus impersonator, employed by a local "Rent-A-Santa" business. When Booth and Brennan inspect Kris' apartment, not only do they find his place decked out with holiday cheer, but they also find thousands of dollars stashed in a dresser drawer. As Christmas Day approaches, the Jeffersonian team works to find out who would have wanted this true-to-myth Santa dead. Meanwhile, Brennan visits her father in jail and plots a not-so-traditional Christmas reunion, and Booth and Brennan find themselves in close quarters with the mistletoe just overhead.

Patrick Jane and the CBI team decide to conduct their own investigation when Lisbon is accused of murdering a recently paroled child molester she arrested in her past.

Charlie has to find creative ways to entertain the 4-year-old son of his girlfriend, Linda (recurring guest star MING WEN). Meanwhile, Alan becomes a human "guinea pig."

Derek's mother arrives in Seattle and meets Meredith for the first time; the patient on death row wants to donate his organs to Bailey's young patient, Jackson; Callie has a patient who had surgery to make him taller, only it caused massive infections in his legs; Owen asks Cristina out on a date.