Edinburgh, Aug. 20 -- The second season of "Rivals", the unabashedly racy adaptation of Jilly Cooper's celebrated Rutshire Chronicles, is expanding its ensemble with two high-profile additions, including Hayley Atwell and Rupert Everett Saddle.

"Mission: Impossible" star Hayley Atwell joins as Helen Gordon, the former wife of Alex Hassell's Rupert Campbell-Black and mother to his children, Marcus and Tabitha. Opposite her, the distinguished Rupert Everett assumes the role of Malise Gordon, Helen's husband and Campbell-Black's erstwhile mentor in the rarefied world of show-jumping, reports DEADLINE.

Revealed during the Edinburgh TV Festival, season two promises a narrative of heightened stakes and unbridled passions. Showrunner Dominic Tre...