Q. What is it supposed to be on the show?

A. A public street.

 
Q. Where is it supposed to be on the show?

A.  In New York City's Theater District.

Q. When did we see it on the show?

A. In Episode 8 of Season One of Resurrection.

Having seen the horrifying home video of Al Walker (AKA “Rapunzel.”) murdering an innocent girl in cold blood, Dexter is determined to kill him.

He knows that Al is planning to leave town soon, but first Al is attending a performance of the hit musical Hamilton. So Dexter is planning to wait outside the theater and offer him a ride.
 
Dexter has already prepared a kill room in a nearby wig store, an appropriate locale for a killer who cuts the ponytails off his female victims for trophies.

And having just finished a quick meal with his son Harrison at a nearby restaurant, we see Dexter parked outside the theater where Hamilton is showing, waiting for the performance to end so he can nab Al.


But as they say,. “the best laid plans...”

When the performance ends, and everyone else comes out, Al isn't among the crowd leaving the theater.

Eventually, Dexter calls Al on the phone, and Al says that he hated Hamilton (he didn't realize it was a “rap show” when he bought the ticket), and that he left early, before Dexter arrived. He is now in his car on his way out of state, and out of Dexter's reach.
 
Dexter , frustrated, decides to improvise and use the kill room he had set up for Al to instead terrorize Elsa's landlord into acting like a human being.

( The title of this 8th episode: “The Kill Room Where It Happens” is, of course, a play on the title of a popular song from the musical Hamilton: The Room Where It Happens. )

Q. What is it actually in real life?

A. A public street. 

Q. Where can I find it in real life?

A. This is 46th Street, and Dexter is watching the Richard Rodgers Theatre, the actual Broadway theater where Hamilton has been playing on Broadway

It is located at 226 W 46th St, near New York's Times Square.

Dexter is parked on the south side of 46th Street, just a short distance west of the Richard Rogers Theater, where he can watch the crowds come out when the performance ends.

That's only four blocks north of the restaurant where Dexter met Harrison in the previous scene.

Resurrection filmed a number of different scenes in & around the Times Square area this season: there was the scene of Dexter driving into New York, the scene of Dexter walking through Times Square and buying a hot dog, the diner where Angel warns Harrison, and the cocktail lounge where Lady Vengeance picks up her male victim.

The Richard Rogers Theater is named for the man who was half of two very famous songwriting teams: Rogers & Hammerstein, and Rogers & Hart. (Rogers wrote the music, his partners wrote the words.)   With Lorenz Hart, Rogers wrote hundreds of songs and a series of hit Broadway musicals including Babes in Arms, Pal Joey, I Married an Angel, and Jumbo.   With Oscar Hammerstein, Rogers had even bigger Broadway hits, including The Sound of Music, Show Boat, Oklahoma!, Carousel, South Pacific, Flower Drum Song, Cinderella, and The King and I, many of which were made into hit movies.

 
 
Here is a matching StreetView of that street near the theater : 
 


Here is an aerial photo of the location.  And here is a map link.