Spoiler alert. (Duh.)

“Did this show seriously just end its first season without revealing what Project: T.A.H.I.T.I. is?

“Coulson drawing random marks on a wall doesn’t tell us what the blue thing in the tank was, and after a season of teasing us with the truth behind Coulson’s resurrection, it still hasn’t delivered the full story.

“It was the mystery that this entire show was built on, so I assumed this episode would offer some straightforward answers, but instead, “The Beginning Of The End” delivers a lot of cryptic clues setting up the future of the Marvel Cinematic Universe.

“It’s a solid chapter that wraps up the Garrett and Ward Hydra plot with a neat bow while setting Coulson and his team on a clear path for next season, but there’s a lot of teasing where there should be more substantial story.”

– AVClub.com