Heartbeat - Season 15 - Eps 26: Accidents Happen
A jailbird gets out to assist on a hidden agenda. Debbie changes her ways as a known person reunites in her life. A local child acts spiteful at the death of his pet. He creates a bomb and plants it in the Aidensfield Police House. The bomb explodes which kills Helen leaving Rob devastated by her death.
About Heartbeat

Title: Heartbeat
First Air Date: 1992-04-10
Last Air Date: 2010-09-05
Status: Ended
Rating: 7.125/10 (from 32 votes)
Language: EN
Seasons: 19
Total Episodes: 372
Network: ITV1
Genres: Crime, Drama, Comedy
Production Companies: Yorkshire Television
Synopsis
Set during the 1960s in the fictional North Yorkshire village of Aidensfield, this enduringly popular series interweaves crime and medical storylines.
Cast

Derek Fowlds
Oscar Blaketon

William Simons
PC Alf Ventress

Tricia Penrose
Gina Bellamy

Peter Benson
Bernie Scripps

Gwen Taylor
Peggy Armstrong

Lisa Kay
Carol Cassidy

Joseph McFadden
PC Joe Mason

Nikki Sanderson
Dawn Bellamy

David Lonsdale
David Stockwell

Steven Blakeley
PC Geoff Younger