Zimmer eventually booked her first TV series regular role on the NBC comedy "Good Morning, Miami" as the lazy and burned-out office assistant, Penny Barrington. After the series was canceled, she spent the second season recurring as Sister Lilly Waters in the CBS drama, "Joan of Arcadia", as well as guest-starring in episodes of "NYPD Blue" and "Jake in Progress". Also in 2005, she acted in the short film "Just Pray", directed by Tiffani Thiessen. It was accepted into the Tribeca Film Festival.