By Ewa Banaszkiewicz and Mateusz Dymek. Tom and Sarah Hadley appear to have it all. But when Gemma becomes involved with the couple, she finds herself caught in a web of jealousy and lies. Sarah ...... Anastasia Hille Tom ...... Matthew Marsh Gemma ...... Annabelle Dowler Kira/Tasha ...... Lizzy Watts Sebastian Murray ...... Philip Fox Caterer ...... Benjamin Askew Directed by Sally Avens.