Booth and Brennan Question a Lead in "The Source and the Sludge."

Booth listens to what Agent Beck has to say on "The Source in the Sludge."

Agent Danny Beck questions a lead on "The Source in the Sludge."

It looks like Booth might have found his man, flanked by Agent Beck and Brennan on "The Source in the Sludge."

Booth and Brennan encounter insurance issues about the two of them working in the field on "The Source in the Sludge."

Freddie Prinze, Jr. returns to Bones as CIA Agent Danny Beck in "The Source in the Sludge."

Angela and Hodgins are a case of opposites attract. They met while working together at the Jeffersonian. She's a free-spirit artist, while he loves bugs, plants and rocks. Their differences only make their relationship stronger.

Booth and Brennan try to figure out if a victim's strained relationship with her mother is linked to her murder on Bones. "The Heiress in the Hill" is the 15th episode of the show's ninth season.

Booth surveys the crime scene in this Bones still. It is from "The Master in the Slop."

Brennan checks out a parking garage in this Bones photo. It is the scene of the latest crime.

Sweets has some moves! On the chess board, that is. This is a scene from "The Master in the Slop."

Forensic podiatrist Dr. Douglas Filmore plays a key role on the Bones Season 9 episode "The Master in the Slop."