The mind-bending sci-fi show on CBS from Academy Award winners Steven Spielberg and Halle Berry "Extant" will be airing back-to-back episode this Wednesday on the broadcast network.

It will start with the episode "You Say You Want an Evolution" at 8 p.m. EDT, followed by "The Other," according to TV Guide.

The dramatic thriller action of the sci-fi events keep getting bigger and bigger as the stakes rise for several main characters in the show, according to Spoilers Guide.

For Molly (Berry), the changes she is going through are causing her to panic. These aren't just changes in her mind or mental issues. Her body is physically changing and she has no idea what to do. She wants to stop it and she wants to reverse it, but how?

She also has no idea what she is changing into. What is the endgame of her transformation and what will she be when it is over?

To make matters just a little more urgent, JD's (Jeffrey Dean Morgan) ex-wife has just shown up at his doorstep and things get complicated. The visit was unexpected to say the least, but the topic is their mutual daughter.

The night will then switch gears with the next episode, as also reported by Spoilers Guide.

There is a much-needed peace that needs to be accomplished between the humans and the hybrids before things get out of hand. Molly and JD try to make Shepherd see the light on this matter. They attempt to get him to broker a peace deal between the two factions. But this might not go as they had hoped.

Lucy and Charlie will also get complicated when she tries to manipulate him. In her self-serving efforts, she attempts to put Charlie in a compromising position. But this could also work against her and to Charlie's advantage should things go another way.

Check out the previews below.