The Girl in the Mask Spoiler Photos

BONES: Brennan (Emily Deschanel) searches for the remains of Booth's friend's sister in the BONES episode "The Girl in the Mask" airing Thursday, April 23 (8:00-9:00 PM ET/PT) on FOX. ©2009 Fox Broadcasting Co. Cr: Greg Gayne/FOX

BONES: Booth (David Boreanaz) receives a call from a friend living in Tokyo who hopes Booth can help him find his missing sister in the BONES episode "The Girl in the Mask" airing Thursday, April 23 (8:00-9:00 PM ET/PT) on FOX. ©2009 Fox Broadcasting Co. Cr: Greg Gayne/FOX

BONES: Booth (David Boreanaz, C) and Brennan (Emily Deschanel, R) interview a suspect during their search for the killer of Booth's friend's sister in the BONES episode "The Girl in the Mask" airing Thursday, April 23 (8:00-9:00 PM ET/PT) on FOX. ©2009 Fox Broadcasting Co. Cr: Greg Gayne/FOX

BONES: Booth (David Boreanaz, L) delivers the news to his friend Ken Nakamura (Brian Tee, R) that his sister has been found murdered in the BONES episode "The Girl in the Mask" airing Thursday, April 23 (8:00-9:00 PM ET/PT) on FOX. ©2009 Fox Broadcasting Co. Cr: Greg Gayne/FOX

BONES: Booth (David Boreanaz, R) and Brennan (Emily Deschanel, L) search for the remains of Booth's friend's sister in the BONES episode "The Girl in the Mask" airing Thursday, April 23 (8:00-9:00 PM ET/PT) on FOX. ©2009 Fox Broadcasting Co. Cr: Greg Gayne/FOX