Ben Savage Guest Stars as Young Gideon

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Ben Savage ("Girl Meets World," "Boy Meets World") guest stars as young Gideon, and Arye Gross ("Castle," "Ellen") guest stars as Donnie Mallick. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Ben Savage ("Girl Meets World," "Boy Meets World") guest stars as young Gideon, and Arye Gross ("Castle," "Ellen") guest stars as Donnie Mallick. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Ben Savage ("Girl Meets World," "Boy Meets World") guest stars as young Gideon, and Arye Gross ("Castle," "Ellen") guest stars as Donnie Mallick. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Pictured: Kirsten Vangsness, A.J. Cook. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Pictured: A.J. Cook as JJ Jareau. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.

"Nelson's Sparrow" - Criminal Minds S10 E13

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Series star Kirsten Vangsness co-wrote the episode with Erica Messer, one of the series' executive producers. Pictured: Kirsten Vangsness, A.J. Cook. Photo: Robert Voets/ABC Studios ©American Broadcasting Companies, Inc. All rights reserved.
Meet the Writers - Kirsten Vangsness

Meet the Writers - Kirsten Vangsness

Series star Kirsten Vangsness co-wrote this episode with Erica Messer, one of the series' executive producers. The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: Cliff Lipson/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Meet the Writers - Kirsten Vangsness

Meet the Writers - Kirsten Vangsness

Series star Kirsten Vangsness co-wrote this episode with Erica Messer, one of the series' executive producers. The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away, on CRIMINAL MINDS, Wednesday, Jan. 28 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: Cliff Lipson/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved