Three actors featured in guest parts playing different characters before landing permanent roles in the show as new police officers stationed at Mount Thomas, being Tasma Walton (Dash McKinley), Jane Allsop (Jo Parrish) and Samantha Tolj (Kelly O'Rourke). Similarly, many actors also appeared early in the series in one-off guest appearances before later returning as recurring characters for many years. These included Peta Doodson as Sgt./Snr. Sgt./Insp. Monica Draper, Marcus Eyre as Homicide Det. Sgt. Paul Donald, Jeremy Kewley as local newspaper reporter Tony Timms, Terry Serio as Det. Sgt. Mick Doyle, Marie Trevor as Leila Clegg, Gerard Kennedy as mechanic Sal D'Angelo, Don Bridges as plumber Charlie Clarke, Tony Rickards as local schemer Alan 'Compo' Hayes, Debra Lawrance as Rev. Grace Curtis, and Suzi Dougherty as Dr. Mel Carter - all originally appeared as totally different characters before securing these ongoing roles.
Constable Evan 'Jonesy' Jones:
Hey, you're talking about a friend of mine!
Sr. Sgt. Tom Croydon: Then I suggest in future you pick your friends more carefully.
Constable Evan 'Jonesy' Jones: Who my friends are is none of your business!
Sr. Sgt. Tom Croydon: While you're working for me, they most certainly are, and don't you forget it!
Throughout the series, Mount Thomas is shown to have at least three major supermarkets (and several smaller), multiple banks, service stations, hardware stores and at least ten pubs, but whenever someone calls the station to report a crime the answering officer will always tell Tom or a colleague (with extremely rare exceptions) that an incident has occurred/is in progress "down at the pub/at the supermarket/the bank/the servo", etc., without ever specifying exactly which one, but the other officer magically automatically knows before responding.
When shown in the U.K., many of the ITV regions do, or have at some stage, edited the episodes, originally hour-long, into two-part stories, half hour each half.