When did Elementary Season 4 Episode 21 air?
Elementary Season 4 Episode 21 aired on April 17, 2016.


New Holmes. New Watson. New York.
A modern-day drama about a crime-solving duo that cracks the NYPD's most impossible cases. Following his fall from grace in London and a stint in rehab, eccentric Sherlock escapes to Manhattan where his wealthy father forces him to live with his worst nightmare - a sober companion, Dr. Watson.

When Holmes and Watson are pulled into a double-homicide investigation, they discover the victims were staging a fake murder right at the moment they were killed. Also, Watson's inside man at Morland's office encounters a problem that threatens to expose her spying to Holmes and his father.
Direct answers for episode-level questions and details.
Elementary Season 4 Episode 21 aired on April 17, 2016.
This episode runs for approximately 43 minutes.
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