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TV

Season 4

25 :04x01 - The Perfect Husband

Sep/08/2013
A man grows suspicious when his wife disappears.

26 :04x02 - The Family Man

Sep/15/2013
A father of three is suspected of committing a series of attacks in Ocala, Fla.

Source: Investigation Discovery

27 :04x03 - Civil War Serial Killer

Sep/22/2013
The hunt for a serial killer in the Midwest is chronicled.

Source: Investigation Discovery

28 :04x04 - Under the Melting Snow

Sep/29/2013
A sister suspects her troubled brother knows more than he should about women who are missing from the streets of Edmonton. Only when she looks inside his hockey bag, does she make a shocking discovery.

Source: Investigation Discovery

29 :04x05 - Secret Agent Dad

Oct/06/2013
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30 :04x06 - Black Widow of Texas

Oct/13/2013
When a son suspects his dad’s new wife is evil, no one will listen. Even after Jimmy Don Beets goes missing on a fishing trip, there is no police investigation. Years later, the dark truth of what is buried in the widow’s garden will be revealed.

Source: Investigation Discovery

31 :04x07 - Doctor of Deceit

Oct/20/2013
A motel owner looks for love online, but finds herself in the midst of intrigue when she meets a doctor involved in a top-secret government project. After his wife goes missing, she realizes that he's hiding a deadly secret.

Source: Investigation Discovery

32 :04x08 - The Kensington Strangler

Dec/19/2013
A woman wonders if her lover is the man responsible for three Philadelphia killings.

Source: Investigation Discovery
Warning: The Devil You Know guide may contain spoilers
Classification: Reality
Genre: Drama | Family | Thriller
Status: On Hiatus
Network: Investigation Discovery ( USA)
Airs: Thursdays at 10:00 pm
Runtime: 30 Minutes
Premiere: June 15, 2011
Episode Order: 8
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