Joe Otterson TV ReporterThe upcoming FX limited series “The Patient” has cast Alex Rich in a recurring role, Variety has learned exclusively.Rich joins previously announced series leads Steve Carell and Domhnall Gleeson as well as cast members Linda Emond, Laura Niemi, and Andrew Leeds in the series, which hails from “The Americans” duo Joe Weisberg and Joel Fields.In the half-hour series, a psychotherapist (Carell) finds himself held prisoner by a serial killer (Gleeson) with an unusual request: curb his homicidal urges. But unwinding the mind of this man while also dealing with the waves of his own repressed troubles creates a journey perhaps as treacherous as his captivity.Rich previously appeared in the critically-acclaimed Netflix series “GLOW” in the role of Florian, the butler and best friend of Sebastian “Bash” Howard.