Gotham Season 1: Where to Watch Episode 5 'Viper' Online; Gotham and Arrow Crossover Rumours Cleared

Gotham Season 1 Episode 5 titled Viper airs tonight and here's what the official synopsis reveals about the upcoming episode:

"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.

A Hypable report also reveals that young Bruce Wayne and Alfred's lives will come into danger. Plus Selina Kyle will make a return.

Also, The Penguin will be seen going through a test of loyalty after mob boss Maroni "learns something is up," states the report.

Gotham Episode 5, Viper airs tonight (Monday, October 20) at 8:00-9:00 pm ET/PT on FOX.

Click here to watch the episode online via live stream.

The episode will be made available online on the show's official website. Click here to access.

Meanwhile, for all those fans who got excited about rumours suggesting that a Gotham and Arrow crossover episode could be in the works, here's an update: (via CinemaBlend).

Recently, several astute fans were watching the second episode of Gotham and noticed a peculiar logo on one of Gotham City's buildings: a green Q (image below). In fact, this is the same logo used for Queen Consolidated, the company created by Oliver Queen's family on Arrow.

When they noticed this, some fans wondered if this meant Gotham and Arrow take place in the same universe, and this was the subtle way the shows were telling us.

Sadly, it was nothing that sneaky. While talking to MTV, Gotham producer Danny Cannon stated that putting the logo in the Gotham City skyline was just a giant, weird fluke.

"I gotta tell you, it was completely unintentional. Somebody spotted it in the cutting room, but we move so fast, we were like, 'that's cool, leave it in! don't talk about it!' We were stealing – the visual effects guys were stealing neon letters from other places, and that was one that worked. But it was unintentional."