As "Gotham's" season progresses, the machinations of the Mad Hatter are taking more of a toll on the titular city. A promo for next week's episode, titled "Blood Rush," sees tensions escalate as Barnes (Michael Chiklis) begins to go a bit mad and Gordon (Ben McKenzie) gets back in at the GCPD. And in addition to an increasingly mad Barnes, the promo for "Blood Rush" hints that Nygma's relationship with Isabella is going to take a potentially sinister tone. You can check out the promo for the "Gotham" ep, as well as its synopsis, below.

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EVERYONE’S GOING A LITTLE MAD ON AN ALL-NEW “GOTHAM” MONDAY, NOVEMBER 7, ON FOX

Barnes begins to feel the effects of a recent incident and begins to go mad. Meanwhile, Nygma is out of his depth in his relationship with Isabella (guest star Chelsea Spack) and Carmine Falcone (guest star John Doman) throws Lee and Mario (guest star James Carpinello) an engagement party in the all-new “Mad City: Blood Rush” episode of GOTHAM airing Monday, Nov. 7 (8:00-9:01 PM ET/PT) on FOX. (GTH-308) (TV-14 L, V)

Starring Ben McKenzie as Detective Jim Gordon, "Gotham" airs Mondays at 8 pm ET/PT on Fox. The series also stars David Mazouz as young Bruce Wayne, Camren Bicondova as young Selina Kyle, Donal Logue as Harvey Bullock, Robin Lord Taylor as Oswald Cobblepot, Morena Baccarin as Leslie Thompkins, Jada Pinkett Smith as Fish Mooney and more.