Get excited, "The 100" fans, because an awesome trailer for the upcoming fourth season dropped Wednesday (Dec. 14), full of juicy (and terrifying) teases of what's to come.

1. This is the way the world ends?

It sure looks as though everything A.L.I.E. said would come to pass is happening -- the black rain, the pre-cancerous lesions, dozens of people dead.

The big question is -- how does Skaikru possibly stop something this monumental in scale? The previous problems they've faced seem like the buzzing of flies compared to nuclear reactors melting down worldwide and destroying basically all life as they know it.

2. Radioactive

Along the way to figuring that out, it definitely looks like radiation poisoning is affecting at least a couple of the core group of characters. We spotted both Jasper (Devon Bostick) and Harper (Chelsey Reist) sporting what appear to be the lesions associated with radiation poisoning -- and then right at the end, Clarke (Eliza Taylor) looks like she's covered in sores. Ruh roh.

3. Relationships

Even if it's a constant apocalypse, there's always time for some lovin'. Murphy (Richard Harmon) and Emori (Luis D'Oliveira) appear to be as hot as ever ... and then at the 2:15 mark, did we spy Abby (Paige Turco) and Kane (Henry Ian Cusick) kissing? Hopefully it's not a chip-induced fake-out this time.

There's also a lovely moment between Clarke and Bellamy (Bob Morley). Their friendship is one of the best relationships on the show, so hopefully after spending so much time apart in Season 3, we get lots of Bellarke action in Season 4.

4. New faces

There are a few new face in the trailer that definitely have us intrigued. The first is a woman who says she can help Roan (Zach McGowan) rule over everyone.

roan The 100 Season 4 trailer teases romance, new characters

The second is a Grounder who definitely wants to kill some people -- Skaikru, we presume.

grounder The 100 Season 4 trailer teases romance, new characters

And the third is a girl who appears to be picking up the commander chip and putting it to her forehead? But she's not Luna (Nadia Hilker). So who is she?

luna The 100 Season 4 trailer teases romance, new characters

Needless to say, we can't wait to find out who all of these people are -- and how "The 100" are going to stop the world from melting down into radioactive waste.

"The 100" returns Feb. 1 on The CW.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."