S06E04: Dumb Witness
Poirot and Hastings are at Lake Windermere for an attempt on the world speed-boat record. An elderly widow is hurt by falling down stairs, then later killed by poisoning with phosphorus.
Previous Episode 
Season 1
The Adventure of the Clapham Cook
S1E1 / 08 Jan 1989
Murder in the Mews
S1E2 / 15 Jan 1989
The Adventure of Johnnie Waverly
S1E3 / 22 Jan 1989
Four and Twenty Blackbirds
S1E4 / 29 Jan 1989
The Third Floor Flat
S1E5 / 05 Feb 1989
Triangle at Rhodes
S1E6 / 12 Feb 1989
Problem at Sea
S1E7 / 19 Feb 1989
The Incredible Theft
S1E8 / 26 Feb 1989
The King of Clubs
S1E9 / 12 Mar 1989
The Dream
S1E10 / 19 Mar 1989
Season 2
Peril at End House
S2E1 / 07 Jan 1990
The Veiled Lady
S2E2 / 14 Jan 1990
The Lost Mine
S2E3 / 21 Jan 1990
The Cornish Mystery
S2E4 / 28 Jan 1990
The Disappearance of Mr. Davenheim
S2E5 / 04 Feb 1990
Double Sin
S2E6 / 11 Feb 1990
The Adventure of the Cheap Flat
S2E7 / 18 Feb 1990
The Kidnapped Prime Minister
S2E8 / 25 Feb 1990
The Adventure of the Western Star
S2E9 / 04 Mar 1990
Season 3
The Mysterious Affair at Styles
S3E1 / 16 Sep 1990
How Does Your Garden Grow?
S3E2 / 06 Jan 1991
The Million Dollar Bond Robbery
S3E3 / 13 Jan 1991
The Plymouth Express
S3E4 / 20 Jan 1991
Wasps' Nest
S3E5 / 27 Jan 1991
The Tragedy at Marsdon Manor
S3E6 / 03 Feb 1991
The Double Clue
S3E7 / 10 Feb 1991
The Mystery of the Spanish Chest
S3E8 / 17 Feb 1991
The Theft of the Royal Ruby
S3E9 / 24 Feb 1991
The Affair at the Victory Ball
S3E10 / 03 Mar 1991
The Mystery of Hunter's Lodge
S3E11 / 10 Mar 1991
Season 4
The ABC Murders
S4E1 / 05 Jan 1992
Death in the Clouds
S4E2 / 12 Jan 1992
One, Two, Buckle My Shoe
S4E3 / 19 Jan 1992
Season 5
The Adventure of the Egyptian Tomb
S5E1 / 17 Jan 1993
The Underdog
S5E2 / 24 Jan 1993
The Yellow Iris
S5E3 / 31 Jan 1993
The Case of the Missing Will
S5E4 / 07 Feb 1993
The Adventure of the Italian Nobleman
S5E5 / 14 Feb 1993
The Chocolate Box
S5E6 / 21 Feb 1993
Dead Man's Mirror
S5E7 / 28 Feb 1993
Jewel Robbery at the Grand Metropolitan
S5E8 / 07 Mar 1993
Season 6
Hercule Poirot's Christmas
S6E1 / 25 Dec 1994
Hickory Dickory Dock
S6E2 / 12 Feb 1995
Murder on the Links
S6E3 / 11 Feb 1996
Dumb Witness
S6E4 / 16 Mar 1997
Season 7
The Murder of Roger Ackroyd
S7E1 / 02 Jan 2000
Lord Edgware Dies
S7E2 / 19 Feb 2000
Season 8
Evil Under the Sun
S8E1 / 20 Apr 2001
Murder in Mesopotamia
S8E2 / 02 Jul 2001
Season 9
Five Little Pigs
S9E1 / 14 Dec 2003
Sad Cypress
S9E2 / 26 Dec 2003
Death on the Nile
S9E3 / 12 Apr 2004
The Hollow
S9E4 / 26 Apr 2004
Season 10
The Mystery of the Blue Train
S10E1 / 01 Jan 2006
Cards on the Table
S10E2 / 19 Mar 2006
After the Funeral
S10E3 / 26 Mar 2006
Taken at the Flood
S10E4 / 02 Apr 2006
Season 11
Mrs. McGinty's Dead
S11E1 / 14 Sep 2008
Cat Among the Pigeons
S11E2 / 21 Sep 2008
Third Girl
S11E3 / 28 Sep 2008
Appointment with Death
S11E4 / 25 Dec 2009
Season 12
Three Act Tragedy
S12E1 / 03 Jan 2010
Hallowe'en Party
S12E2 / 27 Oct 2010
Murder on the Orient Express
S12E3 / 25 Dec 2010
The Clocks
S12E4 / 26 Dec 2011
Season 13
Elephants Can Remember
S13E1 / 09 Jun 2013
The Big Four
S13E2 / 23 Oct 2013
Dead Man's Folly
S13E3 / 30 Oct 2013
The Labours of Hercules
S13E4 / 06 Nov 2013
Curtain: Poirot's Last Case
S13E5 / 13 Nov 2013
