The Secret Adversary
Warwick appeared in several adaptations of the works of Agatha Christie including "Why Didn't They Ask Evans?" (1978) (alongside Francesca Annis), "The Seven Dials Mystery" (1981), "Partners in Crime" (1983) (alongside Francesca Annis as the sleuthing couple Tommy and Tuppence) and "The Secret Adversary" (1983) (also alongside Francesca Annis).