Bones: Season 5, Episode 18

5 - 18: The Predator in the Pool

A case leads Booth and Brennan to an aquarium where the remains were found inside a shark. The case is brought to them by Dr. Catherine Bryar (Rena Sofer) of the National Oceanic and Atmospheric Administration, who seems to show an interest in Booth. Both Booth and Brennan try to move on into romantic relationships as Brennan goes on another date with Andrew Hacker, and Booth asks out Catherine after the case is solved.