First, we got this brief but potent teaser that offered a fresh, deeply unnerving glimpse at the return of Joquin Phoenix’s sad sack comedian turned killer clown Arthur Fleck crying/laughing (or laughing/crying) in the rain. Next, we got the first full trailer, which revealed Lady Gaga’s Harley Quinn and the first cinematic portrayal of the most demented romance in comics history since Margot Robbie and Jared Leto played the demonic pair in David Ayer’s 2016 Suicide Squad. Now comes the second trailer, revealing more of director Todd Phillips’s sequel, which has taken the bold step of leaping from the overwhelming successful formula of the original Joker, which was a realist, decidedly dark, R-rated psychological portrait of a man succumbing to his own madness by offering up something entirely new; a jukebox musical.

Joker: Folie à Deux unites Oscar winners Phoenix and Gaga in one of the year’s most must-see releases. In the official trailer, we’re back with Arthur as the police are escorting him through a Gotham he helped set on fire in the first film. We’re quickly taken to Arkham Asylum, one of the most iconic locations in all of Gotham, where Gaga’s Harley Quinn describes her reaction to first seeing Joker. “For once in my life, I didn’t feel so alone anymore,” she says. Uh oh.

What follows are firey images of a romance brewing in madness (which brings us back to the film’s title, a medical reference for two or more people suffering the same mental malady). The film’s promise of a jukebox musical begins, and the music starts. Arthur finds himself softly singing a tune, and soon, we see the Joker and Harley dancing in the moonlight and the Joker defending himself in clown paint in his trial.

The trailer gets dark, diabolical, and decidedly action-packed as it reaches its conclusion, the most fulsome look yet at the movie everybody will be talking about this fall.

Check out the trailer below. Joker: Folie à Deux arrives on October 4: