The CW's newest series Roswell, New Mexico is finally underway! For those of you who don't know, the show is a reboot of the 1999-2006 series Roswell and, along with its counterpart, an adaptation of the Roswell High novels by Melinda Metz. Though diehard fans have welcomed the return of their favorite sci-fi, the show's creator Carina Adly Mackenzie has updated the storyline and characters, lending the series a more 'adult' tone and some unpredictability. Whether you're a Roswell fanatic or just curious, we've put together a summary of which elements The CW reboot is keeping and what major changes they're making.