On the cop drama Aquarius, Sam Hodiak (David Duchovny) and Brian Shafe (Grey Damon) are trying to track down a serial killer who’s targeting homosexual men in Los Angeles. Meanwhile record producer Elliot Hillman returns to Charles Manson’s compound. Hillman has a renewed interest in Manson (Gethin Anthony).
Record producer Hillman is portrayed by Evan Arnold. Arnold is best known for his roles on Mad Men (Leonard), Masters of Sex (Dr. Ditmer), Suburgatory (Chef Alan), The West Wing (Ned), and, wait for it…Growing Pains (Richie Franzkopper). Aquarius airs Saturdays at 9pm on NBC.