'Arrow' Season 2 finale: Fighting, emotions and a chance of death in 'Unthinkable'

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"Arrow" Season 2 has been building the tension for many episodes now, and the finale, "Unthinkable," looks ready to pay out. What is coming in this last episode? Executive producer Andrew Kreisberg offered a few hints and spoilers in a recent interview with Zap2it.

Zap2it: How would you describe the finale?
Andrew Kreisberg : It's the biggest episode we've ever done. I mean, every time I watch it, I literally cannot believe what we've done. I think it's one of the biggest things that's ever been on network TV, just in terms of scope. And then in terms of emotion, this whole season was much more emotionally fraught than Season 1 was. I think the finale is all of that turned up to 11.

When you say it's the 'biggest episode,' does that mean a lot of fights or a lot of story or what?
Basically everything. The only complaint we've gotten from the few people who've seen it is, 'Man, a lot is going on in 42 minutes!' We had a lot to pay off. It was a big season in terms of scope and emotion and story. One of the things we set out to do was to go out in this very big, epic way and to have as many threads as we have unleashed throughout the season get paid off.

Are there any recurring characters who might pop up in 'Unthinkable'?
You see the return of Nyssa and the League of Assassins and the Suicide Squad and Shado's ghost -- it is chock-full. Hopefully in a satisfying way and not in an 'Oh dear God, what have you people done?' kind of way.

[Nyssa]'s brought a small coterie of men with her, at Sara's behest, we will discover. This is Sara's contribution to saving the day. One of the questions in the episode -- because Oliver has been struggling with 'Do I kill? Do I not kill?' -- and now he's up against an army that's willing to do anything. And the only people that are willing to help him are cold-blooded murderers.

How worried should fans be about their favorite characters surviving into Season 3?
I think on a show like this, you should always be worried. I think that's one of the things that keeps the show kind of grounded, ironically, is the fact that people do die. If you're going to strap on a mask and go out and take on people and run across rooftops -- there's a good chance you're gonna get killed or worse. That has kept the stakes high from the show.

The death of Tommy at the end of Season 1 really changed the show. In Season 2, there was really this feeling of 'If Tommy could die ...' And then with the death of Moira, I think it makes you even more so -- we killed two of our main, original cast members. Rather than looking at it as a bad thing, we tend to look on it as a good thing. We always talk about it in the room as that being 'schmuck bait' -- meaning, is anyone really going to think for one second that one of our characters is really in true jeopardy. We like to think that because of the deaths that have occurred on the show, people should always be afraid that they might not win out -- especially with what they're up against in the finale.

Are there any light-hearted moments amidst all of the fighting?
In addition to some of our biggest set pieces and probably a lot more action scenes than we've ever ... a lot more visual effects, there are just some hilarious moments, some laugh-out-loud moments. There's also just some amazing emotional scenes, especially between Oliver and Felicity and between Thea and Roy, between Thea and Malcolm.

Is Oliver facing any more life-altering decisions going into this finale?
Along the way he's faltered -- like when he killed Count Vertigo for Felicity. Now, in this finale, he's up against an unstoppable force, and his only allies are the League of Assassins. And they are assassins, that's what they do. Nyssa even says in this episode, the League does not take prisoners. Oliver is really faced with, 'Can I save the city and still be a hero at the same time?'

The "Arrow" Season 2 finale, "Unthinkable," airs Wednesday, May 14 at 8 p.m. ET/PT on The CW.
Photo/Video credit: The CW