Meryl Streep and Melissa McCarthy just had it out on the latest episode of Only Murders in the Building, and it was the greatest, most unexpected moment of the series so far. Charles ( Steve Martin ),

After realizing in last week's episode of "Only Murders in the Building" that Season 4's killer has been watching the trio, Charles, Oliver and Mabel leave the Arconia and New York City to go lay low at Charles' sister Doreen's house in Long Island,

The following interview contains spoilers from "Valley of the Dolls," Episode 7, Season 4 of "Only Murders in the Building," now streaming on Hulu. A Suffolk County, Long Island safe house full of creepy dolls,

If anyone had told Only Murders in the Building co-creator John Hoffman he’d have Meryl Streep and Melissa McCarthy in a full-on girl fight on the series, he’d have never believed you.

After six episodes of mounting insanity, “Valley of the Dolls” offers its characters a much-needed reprieve. There are no gunshots or death threats here; there’s just the trio hanging out in the doll-infested home of Charles’ sister Doreen (Melissa McCarthy).

Meryl Streep and Melissa McCarthy "didn't need the stunt doubles!” for their on-screen fight, Selena Gomez says. “They were great!”

Production designer Patrick Howe explains how that Long Island home came to be filled with "an infinite number" of dolls.

Only Murders in the Building has always been a show that sets up rails only to plow directly off of them, but Season 4 is proving to be the most unhinged season of the bunch. That statement is evidenced by Episode 7,