Hemdale is a rehabilitation facility.
As a patient,
Sherlock Holmes noted during his stay there that the other addicts would often gather in the common room to watch baseball games on the television.
They have a pool,  and large garden. 
Dr. Stephen Carrow 
 Dr. Ryan
 Dr. Caruso
 Mr. Edson (groundskeeper)
Season one appearances
While You Were Sleeping
One Way to Get Off The Long Fuse
You Do It to Yourself
The Red Team
A Giant Gun, Filled with Drugs
Déjà Vu All Over Again
Dead Man's Switch
A Landmark Story
Pilot," aired September 27, 2012. Elementary, Season 1, Episode 1. CBS. Directed by Michael Cuesta, written by Robert Doherty.
While You Were Sleeping," aired October 4, 2012. Elementary, Season 1, Episode 2. CBS. Directed by John David Coles, written by Robert Doherty. ↑
3.0 3.1 3.2 3.3 3.4 "
One Way to Get Off," aired November 15, 2012. Elementary, Season 1, Episode 7. CBS. Directed by Seith Mann, written by Christopher Silber.
↑ Dr. Carrow's full name can be seen on the nameplate he wears in "
One Way to Get Off." ↑ "
Déjà Vu All Over Again," aired March 14, 2013. Elementary, Season 1, Episode 18. CBS. Directed by Jerry Levine, written by Brian Rodenbeck.