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The Flash returns from its winter hiatus tomorrow night, but over the weekend The CW brought the cast and crew to PaleyFest to premiere a sneak-peak sizzle reel and tease the remaining episodes of the show's first season. Now, the network has released the action-packed trailer online, and it's a doozie. The 2-minute trailer packs in teases of the Reverse Flash reveal, Captain Cold's (Wentworth Miller) return,  Gorilla Grodd, and Mark Hamill's The Trickster. We also get a look at the next Arrow crossover that sees Felicity (Emily Bett Rickards), Ray Palmer aka The Atom (Brandon Routh), Laurel (Katie Cassidy) and Detective Lance (Paul Blackthorne) all headed to Central City.

Check out the trailer below and be warned there are spoilers.

Looks like the gang is finally finding out Dr. Wells's (Tom Cavanagh) secret - he's definitely a Reverse Flash, but it's still to be seen if he's the villain we're all expecting him to be. He ominously says that Barry (Grant Gustin) will die - is that a threat or a warning? On the other hand, it looks like Eddie Thawne (Rick Cosnett) is decidedly headed in a dark direction. In Christina's PaleyFest coverage, she revealed that future episodes will deal with the ramifications of time travel. Could that be why Central City's hero cop has suddenly turned into a cold-blooded killer? Or is it that Barry is still relentlessly pursuing his girlfriend, and he just can't take it anymore? (Seriously though, Barry, ease up).

All told, this trailer promises that the final block of episodes will live up to the quality we've come to expect from the show. I can't wait to see how the first season wraps up. The Flash returns tomorrow night, March 17th, on The CW.

What do you think? Which new or returning character are you most excited to see? Will the climax of the first season will live up to your expectations? Sound off in the comments.

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