With the first half of Season 4 already in the books, the cast and crew of TNT's Falling Skies hit the Comic-Con stage earlier today to debut a trailer that teases new developments as the season winds to a close. Take a look at the new footage, where Tom (Noah Wyle) volunteers to pilot an alien spacecraft as the battle to reclaim Earth continues, then read on for new details from showrunner David Eick and the cast.

Executive producer and showrunner David Eick first spoke about the different perspectives held by Tom, Lexi (Scarlett Byrne) and Anne (Moon Bloodgood).

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"In Tom's world we were in darkness. Lexi's world - it was light. It was almost like Munchkinland. In Anne's world it was very gritty but stripped down."

The main characters were separated through most of this season, although they have now found their way back to each other. Sarah Carter, who portrays Maggie in the series, teased that the rest of the season is rather intense.

"The second half is gnarly, you guys."

The cast and crew also showed a clip from this Sunday's new episode, "Door Number Three", where fans saw Karen capturing both Karen and Lexi, a memory Karen had previously blocked out.

"She's my creation. In time, she'll be just like me. She'll change the face of history."

The actress also teased a scene with Anne and her son, that offers a glimpse into her life before the aliens decimated the planet.

"We never really understood what life was like for her before the invasion. It was probably my favorite episode to shoot."

One of the scenes in the trailer shows Weaver (Will Patton) expressing hope that they can actually win this war, since it's becoming more clear that the Espheni aliens aren't exactly presenting a unified front. Here's what David Eick had to say about the mindset of these aliens going into the second half of the season.

"These characters are not of one mind. They're not just a hive-like simplistic being. They might have differences with one another. They might have feelings for one another. They might have jealousies that could get in the way of their agenda. In season 5 we'll explore that further."

Another scene showed that Lexi will have another transformation, as Hal (Drew Roy) and Pope (Colin Cunningham) try to get to her, finding their path blocked by her devoted followers such as Lourdes (Seychelle Gabriel) while Lexi is seen inside an orange cocoon. Here's what Scarlett Byrne had to say.

"She's gonna go through a change. [Lexi] steps into her own. She's constantly changing, but this is the beginning of a very drastic physical and mental change for her."

Drew Roy also added how important the love triangle between his character Hal, Maggie and Ben (Connor Jessup) will become to the show.

"It's one of the more special things we got to do on the show just because we had to pay special attention to our motives, to what we were doing and make sure it had a good payoff. Week-to-week, even inside one episode, you could be pulling for this part of the triangle or this part of the triangle."

David Eick also teased that fans will get to see "new variations on existing species."

"The Espheni are very immersed in genetics, the idea of altering, the idea of adapting, and corrupting, mutating. It's a terrifying idea, one that resonates. It does feel like a kissing cousin of where we are in real life. Hopefully it'll scare the s- out of you."