Many actors who had previously appeared on Jack Webb's previous series, "Dragnet", appear in "Emergency" as well. In this episode they have, Virginia Gregg, Virginia Vincent, Marco Lopez (billed as Marco Antonio, in Dragnet) , Tim Donnelly & Susan Seaforth Hayes (Susan Seaforth). Donnelly (Chet) and Lopez (Marco) would become part of the regular crew at Station 51.
Tim Donelly & Marco Lopez had previously had guest appearances on "Dragnet", but become regulars on "Emergency". Marco was billed as Marco Antonio in "Dragnet."
Virginia Gregg makes her first appearance in this episode as Wilma Jacobs, RN.