“Castle” and “Firefly” star Nathan Fillion will play Greek deity Hermes in the upcoming sequel “Percy Jackson & The Olympians: The Sea of Monsters” for Fox 2000 says The Hollywood Reporter.

Logan Lerman is returning in the role of demigod Percy, while Alexandra Daddario and Brandon T. Jackson also are returning which has Percy and his friends following in the footsteps of Jason and the Argonauts as they head out in search of the mythical Golden Fleece.

In the series, Hermes is the father of antagonist Luke (Jake Abel). Fillion replaces Dylan Neal who had a cameo as Hermes in the first film.

Chris Columbus and Karen Rosenfelt are producing.