Brennan and Booth travel to Washington state to determine how a human arm ended up in the stomach of a black bear.
The team investigate a murder that seems to be linked to a string of spy-themed robberies that target wealthy people.
Buffy's dinner date with Principal Wood ends in a mission to save Xander.
Robin Wood seeks revenge on Spike for killing his mother nearly 30 years ago, whilst everyone else tries to find out how The First has control over him.