Leo Woodall Dexter Actor Ambika Mod Emma Actor Amber Grappy Tilly Actor Tim McInnerny Stephen Actor Jonny Weldon Ian Actor Brendan Quinn Callum Actor Essie Davis Alison Actor Adam Loxley Graham Actor John Macmillan Aaron Actor Jodie Price Sonya Richards Actor Molly Manners Director Luke Snellin Director John Hardwick Director Kate Hewitt Director Nicole Taylor Writer, Executive Producer Anna Jordan Writer Bijan Sheibani Writer Vinay Patel Writer Roanna Benn Executive Producer Jude Liknaitzky Executive Producer David Nicholls Executive Producer