Margaret Johnston, an Australian-born British actress, carved out a compelling, if brief, film career that has nonetheless captured the attention of discerning physical media collectors. Primarily known for her formidable stage presence, Johnston brought a captivating depth to her cinematic roles, making her films sought after for their nuanced performances and historical significance. Before her retirement in 1968, she amassed a dozen film credits, each offering a fascinating glimpse into a talent that shone brightly in a variety of genres. For collectors, Johnston's work offers glimpses of cinematic history spanning three decades. *The Prime Minister* (1941), an early war-era drama, showcases her in a significant role amongst a strong British ensemble, a film often released on DVD as part of classic British cinema collections. However, it's her later work, notably *Sebastian* (1968), that truly holds allure for her fans. This spy thriller, starring Dirk Bogarde and Lilli Palmer, represents Johnston's final film appearance and is particularly prized by collectors who appreciate the transitional period of late-60s cinema and often seek out its various home video releases for historical completeness and picture quality. Her limited filmography ensures that each of her cinematic contributions is a valued piece in a collector's library, speaking to an era when screen presence was paramount.