Bones - Season 4 - Eps 4: The Finger in the Nest
Parker, Booth's son, discovers a corpse's finger in a bird's nest, causing the team to launch an investigation to try to find the rest of the body. After finding the corpse, the team discovers that the death was caused by a dog, leading them to an illegal dog fighting ring and a search for the killer dog and its owner.
About Bones

Title: Bones
First Air Date: 2005-09-13
Last Air Date: 2017-03-28
Status: Ended
Rating: 8.214/10 (from 3278 votes)
Language: EN
Seasons: 13
Total Episodes: 246
Network: FOX
Genres: Crime, Drama
Production Companies: 20th Century Fox Television, Far Field Productions, Josephson Entertainment
Synopsis
Dr. Temperance Brennan and her colleagues at the Jeffersonian's Medico-Legal Lab assist Special Agent Seeley Booth with murder investigations when the remains are so badly decomposed, burned or destroyed that the standard identification methods are useless.
Cast

Emily Deschanel
Temperance 'Bones' Brennan

David Boreanaz
Seeley Booth

John Boyd
James Aubrey

Michaela Conlin
Angela Montenegro

Tamara Taylor
Camille Saroyan

T.J. Thyne
Jack Hodgins