Supergirl's Melissa Benoist Doesn't Know Who's In The Spaceship

The first season of Supergirl ended on a pretty huge cliffhanger: a small, Kryptonian-looking rocket, nearly identical to the ones that brought Superman and Supergirl to Earth, crash-landed outside of National City. Upon opening it, Supergirl looked at its contents, surprised, and that was it.

What's in the rocket? Fans have their theories, we have ours. But what does Melissa Benoist have to say?

Well, according to a new video interview with TVLine, she doesn't know.

"I have theories. I've heard some rumblings as to who it may be, but I'm not positive," Benoist said.

Supergirl had the biggest debut of the 2015-2016 season, but lost about half of its viewers over the course of its first season. While it remained one of CBS's biggest shows, the cost of making the series is significant. It's reported that Supergirl costs about $3 million per episode.

The show will head to Vancouver, where tax incentives will reduce the cost of production. In its first season, Supergirl filmed in Los Angeles.

One of the highest-rated and most buzzed-about episodes of Supergirl this year was its crossover with The Flash. A move to The CW -- especially if the movie is also physical and production is relocated to Vancouver -- will mean an increase in crossover opportunities with the DC Universe set up at the network. Supergirl shares executive producers Greg Berlanti and Andrew Kreisberg with Arrow, The Flash, and DC's Legends of Tomorrow. A four-way crossover has already been promised for the coming broadcast season.

Supergirl will air on Mondays at 8 p.m. ET/PT on The CW starting in the fall.