Heartbeat - Season 12 - Eps 7: Dirty Len
Mike searches for a link between a dead farm worker and a spate of animal deaths. Alfred leaves David high and dry in Whitby. Meanwhile Tricia is upset, because of her patient dieing. She soon starts to feel guilty over the death of Len. She thought that it was tetanus but lad results come back with poison and she blames herself for not picking up on it. Even though there was nothing she could have done she still blames herself and feels that she was bad doctor.
About Heartbeat

Title: Heartbeat
First Air Date: 1992-04-10
Last Air Date: 2010-09-05
Status: Ended
Rating: 7/10 (from 31 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