Season 19 • Episode 20

Exchange

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2009-05-13 ★ 7.2 45 min

Two engaged scientists die in a fire and their mentally challenged neighbor is injured while trying to help them. The detectives discover that the couple was stabbed before the fire and this leads them to a disturbed and extremely jealous woman.

Guest Stars

Elizabeth Marvel

Leslie Hendrix

Olga Merediz

David Fonteno

Joshua Nelson

David Lansbury

Gretchen Hall

Peter Appel

Purva Bedi

Brenda Denmark