Barry Kivel

While J.D. (Braff) struggles with whether to tell Dr. Cox the truth about the baby's paternity, he gains some valuable insight into Dr. Cox' (John C. McGinley) troubled mind and his relationship with Jordan (guest star Christa Miller Lawrence) when he meets Dr. Fisher (guest star Jay Mohr, "Mohr Sports"), a former student of Dr. Cox. When Dr. Kelso (Ken Jenkins) prevents Turk (Donald Faison) from playing his pre-surgery basketball game, Turk retaliates by cutting the cord to Kelso's beloved Ms. Pac Man machine. Meanwhile, Carla (Judy Reyes) worries that she's lost her sex appeal since she got engaged and Elliot's (Sarah Chalke) lucky streak continues as she makes a new friend in the janitor (Neil Flynn). Jay Leno, host of NBC's "The Tonight Show with Jay Leno," also guest-stars.

Michelle is jealous when the family baby-sits for a neighbor's infant.

D.J.'s baby-sitting job is made no easier by the child she is looking after.

Data is transported back in time to 19th-century San Francisco, where he hopes to solve the mystery of his death.

Tony goes too far in his enthusiasm for his new post as a volunteer fireman.

Julie meets with another of Dr. Lester's female patients who said she was drugged and raped at the doctor's clinic, and Avedon agrees to be interviewed on national television.