bringing them along. When Irma and Penelope refuse to tell him where the bomb is hidden, Drummond searches Grace for the explosive, finally stripping her naked and throwing her overboard. When the guard holding Irma and Penelope at gunpoint is distracted by this, the pair escape. As they race away in a speedboat, Irma reveals that the bomb is in Grace's hairclip. Penelope is aghast; having envied Grace's chignon, she stole it and is wearing it. The two assassins are killed when it explodes. Meanwhile, Drummond and Robert dive into the sea to rescue Grace. Cast Richard Johnson as Hugh 'Bulldog' Drummond, a secret agent assigned to investigate mysterious killings. Elke Sommer as Irma Eckman, one of Carl Petersen's assassins along with Penelope. Sylva Koscina as Penelope, one of Carl Petersen's assassins along with Irma. Nigel Green as Weston / Carl Petersen, a wicked man and the boss of Irma and Penelope. Suzanna Leigh as Grace, one of Petersen's assistants who falls in love with Drummond. Steve Carlson as Robert Drummond, Hugh Drummond's nephew Virginia North as Brenda, Robert's girlfriend. Justine Lord as Peggy Ashenden, Bledlow's secretary Leonard Rossiter as Henry Bridgenorth, one of the murdered men Laurence Naismith as Sir John Bledlow, Peggy's boss Zia Mohyeddin as King Fedra, an Arabian king and friend of Robert. Lee Montague as Boxer, a crime boss and friend of Drummond's. Milton Reid as Chang, Petersen's brutish henchman Yasuko Nagazumi as Mitsouko, one of Petersen's assassins Didi Sydow as Anna, one of Petersen's assassins George Pastell as Carloggio John Stone as David Wyngarde, Drummond's friend who assigns him to the case. Dervis Ward as Keller, the first person to be killed by Irma at the beginning of the film. William Mervyn as A Chairman of the Phoenician Board Production The success of the James Bond films saw a revival in the novels of Bulldog Drummond. The film was publicity announced in December 1964 (under the title of Female of the Species) but it wasn't filmed until 1966. It was the first production from Amerlon Productions, a subsidiary of Inflight, the company that showed in-flight movies. Richard Johnson, then best known for being the husband of Kim Novak, was cast as Drummond. Filming began in London on 23 May 1966. In an interview, Ralph Thomas stated that the film was intended as a pilot for a television series. It was filmed in three months