Lisa Bonet is headed to a different dangerous world.

The Cosby Show alumna is joining Ray Donovan‘s upcoming fourth season in a major recurring role, TVLine has learned exclusively.

Bonet, whose more recent TV credits include arcs on SundanceTV’s The Red Road and ABC’s short-lived Life on Mars, will play Marisol, an unstable woman with a damaging secret.

This marks the Showtime drama’s fourth new Season 4 hire, following the casting of Gabriel Mann (Revenge), Ted Levine (Monk) and Ismael Cruz Cordova (The Good Wife).