Its actually a very talky episode.

Below, EW chats with theHeroesalum about whats to come in the last two episodes beforeCrisis on Infinite Earths.

Were going to go much further as these episodes go on.

The Last Temptation of Barry Allen, Pt. 1

Katie Yu/The CW

Bloodworks look kind of evolves all the way through the next two episodes, which is really cool.

It was really cool to see.

It wasnt really cool to do at all; it was very not fun to do.

Showrunner Eric Wallacedescribes these episodes as cuckoo crazy dark town.Do you agree with that assessment?One hundred percent.

I was texting him, How far do I go?

What would you say is too far from this?

Hes like, You cant go too far.

This guy has lost his marbles at this point, so go with it and have fun.

I was given free rein, which is pretty rare for an actor.

Theyre usually trying to rein us in, and Eric just gave me the freedom to go for it.

for him, it was just like hes dying and unless he does this, hes going to die.

Everything is literally life and death with this character.

Even though you go to crazy places with the character, thats where the groundedness came in from.

You know where its coming from.

Eric also said that Bloodwork may have a point.

How convincing did you find whatever hes offering Barry?Oh yeah.

I think youre going to see a lot of that in tomorrows episode.

He actually does make a compelling argument for what he does, for why hes doing what he does.

Everybody knows that Barry is going to die in Crisis.

Its an oddly touching connection between the two of them.

It sounds like this episode is really heavy on Barry-Ramsey scenes.

What was it like working through the material with Grant?It was really great.

We just kind of clicked from the beginning, Grant and I.

In this episode, its heavy.

Its heavy emotionally for Barry.

Grant had a lot of heavy lifting to do.

We were really helped, quite frankly, by the director of the episode, Chad Lowe.

Chad was a big help to the both of us in all of those scenes.

Weve never really done things like this before.

First of all, having a villain for each half of the season is a new thing forThe Flash.

Grant was really into it, and I think he does an amazing job in tomorrow nights episode.

Its a really great, unexpected lead-up into the crossover, which starts right after Bloodworks arc ends.

The Flashairs Tuesdays at 8 p.m. ET/PT on the CW.