“In this club, there are no rules.” 

The CW has released an awesome new promo, Superhero Fight Club, to kick off both The Flash and Arrow’s final episodes of the season. 

http://www.youtube.com/watch?v=8XE_jH2eQl4

‘The Flash’ Season 1, Episode 18 airs Tuesday, April 14 at 8pm on The CW.

‘Arrow’ Season 3, Episode 19 airs Wednesday, April 15 at 8pm on The CW.