The Magicians has been a mid-season premiere every season, and this year is no exception. Season 5 will return on January 15, 2020 at 10/9c on Syfy.
In season 4, the series starred Jason Ralph, Stella Maeve, Olivia Taylor Dudley, Hale Appleman, Arjun Gupta, Summer Bishil, Rick Worthy, Jade Tailor, Brittany Curran and Trevor Einhorn. Everyone of those cast members is expected to return, save for Ralph.
Source : denofgeek.com