Dark looms in the metro. "Gotham" episode 5 spoilers reveal that Fish Mooney and Penguin will take advantage of the city's new gang dynamics as Gordon tries to get to the bottom of the murders.

Penguin continues to weasel his way back to Gotham's underground under the protection of Maroni as Fish Mooney tries to think of way to get back at Falcone in her quest to be the top dog in the city's organized crime, said the "Gotham" episode 5 spoilers.

But Penguin's cover is blown, which would make it interesting for Cobblepott. Knowing his knack for survival, however, the Penguin will find away to turn this around.

In the last episode, Maroni scored a victory when he secured a waste facility and Fish Mooney realized that Falcone is not indestructible. She thinks that if she's going to take action, she has to do it now and she will plot with Liza, played by Makenzie Leigh, to knock of the crime boss.

Meanwhile, the clip released by FOX shows Bruce Wayne's early beginnings as a detective as he investigates his parents' involvement in Arkham, and the city's criminals, or if they are involved at all.

"Gotham" episode 5 spoilers can be gleaned from the synopsis which reads: "Gordon and Bullock search for the source of a new street drug that causes euphoria then death. Meanwhile, Oswald Cobblepot works his way deeper into Maroni's (guest-star David Zayas) inner circle and Fish Mooney continues her plot against Falcone.

According to the "Gotham" episode 5 spoilers from Hypable, the guest stars for the episode include Daniel London as Stan Potolsky; Genevieve Hudson-Price as Charmagne; Peter Maloney as Isaac Steiner; David Zayas as Maroni; Kett Turton as Busker; Mackenzie Leigh as Liza; Margaret Colin as Taylor Reece; Danny Mastrogiorgio as Frankie Carbone and Jeremy Davidson as Nikolai.

"Gotham" episode 5 airs on October 20 at 8 p.m. on FOX.