The Flash’s first season is coming to a close Tuesday night, with a big finale episode. Barry Allen (Grant Gustin) may now have captured the Reverse-Flash – revealed to be his mentor, Dr. Wells (Tom Cavanagh) – but that doesn’t mean things are slowing down. A defining moment for Barry was seeing his mother killed in front of him as a child, but now that he can travel through time, can he save her? Should he save her?

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IGN has an exclusive clip from the episode, as Barry speaks to his father Henry (John Wesley Shipp) about his wish to try and stop his mother's death and learns how Henry feels about that.At last week’s CW Upfront event, I spoke to Grant Gustin about the end of Season 1, what to expect in the finale and more about what’s been a very busy season for The Flash.

Playing cards, yeah. Exactly!I think Barry feels sad and he feels a little empty still when he catches him. The episode is going to open with them. Barry’s got him in a containment cell and they’re going to monologue at each other and go back and forth with what their motives have been. Wells is going to get into Barry’s head a little bit and send him down the road that Wells wants him to go down and make Barry feel like it’s his decision. So he’s going to manipulate Barry a little bit in the finale.Those are crazy circumstances when you really think about it as an actor. They crafted it really well. I couldn’t think about that scene for a while without crying a lot. Even when we read it, it’s a really well crafted moment. Barry goes back and he’s with his mom the night that she was murdered and he’s there to save her. It’s really emotional.

The Flash: "Fast Enough" Photo Gallery: The Flash: "Fast Enough" Photos 18 IMAGES

You know this from last year - I didn’t know too much about the comics, as far as The Flash and everything. So I learned about a lot of these guys that we’re introducing as we've introduced them. I’ve read the comics now and seeing them in there, it’s exciting. It’s fun. I’ve been looking forward to Grodd all year and I didn’t even know about Grodd until two years ago. I’ve been looking forward to it the whole season. I think it delivered and there will be more of it next season, I think in a bigger way. It’s been really fun. I know we have more next year. I don’t know who but Mirror Master hopefully is maybe coming in, which opens a whole new world that we can have on the show. These guys know what guys to bring on and they know how to do it and they’re giving them cool origins stories in their own way, which I think is awesome.Yeah. I don’t really know what the Legends of Tomorrow show even is yet. I don’t know that anyone really knows [Laughs] but some of those actors that are on that show, it’s kind of crazy that they’ve assembled them all on one show. Victor Garber, Wentworth Miller, Dominic Purcell... It’s crazy. So I’m excited. I know I’m going to be a part of it in some capacity, which is fun. I get to play The Flash on at least three shows now so it’s pretty cool.

The Flash: Season 1 finale airs Tuesday, May 19th at 8:00pm ET/PT on The CW.Eric Goldman is Executive Editor of IGN TV. You can follow him on Twitter at @EricIGN , IGN at ericgoldman-ign and Facebook at Facebook.com/TheEricGoldman