It is 1986 and Britain is booming. “Rivals” dives headfirst into the cutthroat world of TV where hair-dos are big and ambitions are even bigger. Deals are brokered in boardrooms,…

Unhappy newlywed Lina is pitted against her brittle, damaged mother-in-law, Katherine. An affair sets Lina onto a journey of secrecy, betrayal and murder — and a plot to seemingly destroy…