While investigating the murder of an unregistered alien, Kara and Alex find an alien fight club run by Roulette; Hank tries to get to know M’Gann better; Supergirl begins to train Mon-El.

The first rule of alien fight club is don’t talk about alien fight club. Yeah, that joke will probably be made in most of the reviews of this episode of Supergirl which further explores the second Martian survivor M’Gann and also gives us an alien fighting ring.

But, the episode is really interesting because it continues the themes of last episode as to who is “human.” There’s a tidbit in the episode focused on this as Roulette explains that humans don’t care about what happens to the aliens because they don’t see them as human, but other.

And that’s a lot of the episode’s focus, about the “Survivors” of various planets and species on Earth trying to make a life. It’s about the aliens that are here attempting to go forward, but being treated as less.

And that idea of being a survivor extends to Supergirl figuring out what to do with Mon-El and J’onn trying to get to know about M’Gann. All are survivors from their home worlds and have to figure out what to do. Should they continue tradition or should they forge their own way forward? It’s an interesting debate and gets into real world debates such as inter-faith marriages for Jewish individuals and also an exploration of prejudices. It’s some good use of metaphor in entertainment.

I think there’s also a case to be made that the concept of “survivor,” otherness, and trying to find your own also applies to Alex who clearly is crushing on Maggie. I’m cheering for these two to get together.

The episode as a whole is decent and gets us away from the usual alien attacks and the DEO and Supergirl have to deal with it. It also sets up a lot to come. The end of the episode has some twists I don’t want to ruin and is best to experience them. Some are telegraphed, but others are a bit more left field.

A good episode that sticks to positive themes while keeping the entertainment high.

Overall Rating: 8.3