Ellise Chappell (Wendy Roberts) & Mark Frost (Samuel Armstrong) also worked together on episode 3.1, Episode #3.1 (2017), of Poldark (2015) as Morwenna Whitworth & Tom Carne respectively.
Mark Addy (DS Derek Sands) & Aiysha Hart (Leila Sayyad) also worked together on Atlantis (2013) as Hercules & Ariadne respectively.