Much of Arrow Season 8 is shrouded in secrecy. While it is The CW show's final season, it's also meant to serve as a buildup to the network's highly anticipated crossover epic "Crisis on Infinite Earths."In fact, star Stephen Amell teased that buildup by sharing a dialogue excerpt on Twitter. The actor didn't say which episode this comes from or which characters are involved, but he did tag the tweet with the hashtag #ACrisisIsComing, confirming that the exchange involves the upcoming crossover.RELATED: Arrow's Season 8 Was Planned Long Before Crisis on Infinite Earths"Dialogue from the Season 8 Premiere of Arrow," the actor wrote."If I let you help me, you will get hurt or you will get killed and it will be because of me.""You don't know that.""I do know that."

RELATED: Arrow: Amell Teases Oliver's Ending - 'It's What I Pitched For A Long Time'

At the end of Arrow Season 7, Oliver Queen joined the Monitor to travel across the multiverse. Therefore, it's possible that we will see more of the all-powerful cosmic character in the series' upcoming final season.

Returning Tuesday, Oct. 15 at 9 p.m. ET/PT on The CW, Arrow stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Rick Gonzalez as Wild Dog, Juliana Harkavy as Black Canary, Katie Cassidy as Black Siren, Katherine McNamara as Mia Smoak, Joseph David-Jones as Connor Hawke and Ben Lewis as William Clayton-Queen.