PA: Viewer discretion is advised.

BRENNAN AND BOOTH UNCOVER A BONE-SMUGGLING RING WHILE TRYING TO EXPLAIN A YOUNG GIRL'S CANCER ON "BONES" WEDNESDAY, APRIL 26, ON FOX

Booth's boss, FBI Deputy Director Sam Cullen, is anxiously awaiting information from doctors as to why his daughter Amy is dying of a rare form of lung cancer. When Brennan learns of Amy's condition, she questions the rarity of the cancer in a girl of Amy's age and background and discovers Amy had a bone graft as a result of a previous accident. Brennan enlists Booth's help to dig deeper into the origin of the bone graft she received, and they are shocked to learn Amy is not the only person with the rare terminal cancer and that she may be the victim of a crime in "The Graft in the Girl" episode of BONES airing Wednesday, April 26 (8:00-9:00 PM ET/PT) on FOX. (BON-120) (TV-14 D, L, V)

Cast: Emily Deschanel as Dr. Temperance Brennan, David Boreanaz as FBI Special Agent Seeley Booth, TJ Thyne as Dr. Jack Hodgins, Michaela Conlin as Angela Montenegro, Eric Millegan as Zack Addy, Jonathan Adams as Dr. Daniel Goodman.

Guest Cast: John M. Jackson as Dep. Director Sam Cullen; Alexandra Krosney as Amy Cullen; Kathleen Mary Carthy as Julia Cullen; Paul Keeley as Dr. Ken Ralston; Maark Harelik as Dr. Peter Ogden; Sumalee Montano as Alexandra Combs; Katie Mitchell as Maddie Hastings; Matt Winston as Nick Martin; Kendra Johnson as Doctor.