If you are looking for major "suspicion-themed" episodes from other popular shows:
: In this high-tension episode, Serena Joy's betrayal of Fred Waterford is a major turning point. A key "suspicious" moment involves June letting a character die to protect her long-term plan. [S3E12] Suspicion
Cold Water Killer - Storm of Suspicion (Season 3, Episode 12) If you are looking for major "suspicion-themed" episodes