S04E03: They Do It with Mirrors
A reformatory for delinquent boys run by Miss Marple's philanthropic friend becomes the scene of arson and poisoning, and ultimately murder.
Previous Episode 
Season 1
The Body in the Library
S1E1 / 12 Dec 2004
The Murder at the Vicarage
S1E2 / 19 Dec 2004
4.50 from Paddington
S1E3 / 26 Dec 2004
A Murder Is Announced
S1E4 / 02 Jan 2005
Season 2
Sleeping Murder
S2E1 / 05 Feb 2006
The Moving Finger
S2E2 / 12 Feb 2006
By the Pricking of My Thumbs
S2E3 / 19 Feb 2006
The Sittaford Mystery
S2E4 / 01 May 2006
Season 3
At Bertram's Hotel
S3E1 / 24 Sep 2007
Ordeal by Innocence
S3E2 / 30 Sep 2007
Towards Zero
S3E3 / 03 Aug 2008
Nemesis
S3E4 / 01 Jan 2009
Season 4
A Pocket Full of Rye
S4E1 / 06 Sep 2009
Murder Is Easy
S4E2 / 13 Sep 2009
They Do It with Mirrors
S4E3 / 01 Jan 2010
Why Didn't They Ask Evans?
S4E4 / 15 Jun 2010
Season 5
The Pale Horse
S5E1 / 30 Aug 2010
The Secret of Chimneys
S5E2 / 27 Dec 2010
The Blue Geranium
S5E3 / 29 Dec 2010
The Mirror Crack'd from Side to Side
S5E4 / 02 Jan 2011
Season 6
A Caribbean Mystery
S6E1 / 16 Jun 2013
Greenshaw's Folly
S6E2 / 23 Jun 2013
Endless Night
S6E3 / 29 Dec 2013
