The Magicians season 4 returned on January 23, 2019 just days after being renewed for season 5. The next episode is called "The Serpent," and it airs on March 20, 2019.

The Magicians season 4 is in full swing! In the season three finale of The Magicians, magic was finally restored by unlocking the fountain at the other end of the Wellspring, but the Library, Irene McAllistair and Dean Fogg swooped in to reroute magic to themselves. In exchange, Dean Fogg negotiated the lives of his students, erasing their memories and giving each – except Alice who is now imprisoned by the Library – a new, magic-free identity.

Even with their new identities, however the core group is far from safe since inside Castle Blackspire, an ancient, powerful and unkillable Monster escaped confinement and jumped bodies to a new host, Eliot. The season ended with The Monster finding a mind-wiped Quentin, and The Magicians season 4 will pick up with The Monster seeking out the others, and something else.