The Judge is played by Robin Ellis, the actor who played the title role in the original "Poldark"
Rose Reynolds (Betty Carkeek) and Aidan Turner (Ross Poldark) have both worked with actor, Colin O'Donoghue in separate projects. Rose and Colin worked together on the TV show, Once Upon a Time (2011), playing Tilly/Alice and Captain Killian 'Hook' Jones respectively. Aidan and Colin worked together on the TV show, The Clinic (2003), playing Ruairí McGowan and Conor Elliott respectively.