he carried the final episode solo. While Steed and Keel used wit while discussing crimes and dangers, the series also depicted the interplay—and often tension—between Keel's idealism and Steed's professionalism. As seen in one of the three surviving episodes from the first series, "The Frighteners", Steed also had informants among the general population to aid his investigations, similar to the "Baker Street Irregulars" of Sherlock Holmes. The other regular in the first series was Carol Wilson (Ingrid Hafner), the nurse and receptionist who replaced the slain Peggy. Carol assisted Keel and Steed in cases, and in at least one episode ("Girl on the Trapeze") was very much in the thick of the action, but without being part of Steed's inner circle. Hafner had played opposite Hendry as a nurse in one episode of Police Surgeon. The role of Carol Wilson was initially offered to Jan Watson, who turned it down for another film. The series was shot on 405-line videotape using a multicamera setup. There was little provision for editing and virtually no location footage was shot (although the first shot of the first episode consisted of location footage). As was standard practice at the time, videotapes of early episodes of The Avengers were reused. At present, only three complete Series 1 episodes are known to exist and are held in archives as 16-mm film telerecordings: "Girl on the Trapeze" (which does not feature Steed), "The Frighteners" and "Tunnel of Fear". Additionally, the first 15 minutes of the first episode, "Hot Snow", also exist as a telerecording; the extant footage ends at the conclusion of the first act, prior to the introduction of John Steed. The missing television episodes are currently being recreated for audio by Big Finish Productions under the title of The Avengers - The Lost Episodes and star Julian Wadham as Steed, Anthony Howell as Dr Keel and Lucy Briggs-Owen as Carol Wilson. Series 2–3 (1962–1964) Production of the first series was cut short by a strike. By the time production could begin on the second series, Hendry had quit to pursue a film career. Macnee was promoted to star and Steed became the focus of the series, initially working with a rotation of three different partners. Dr Martin King (Jon Rollason), a thinly disguised recreation of the Keel character, saw action in only three episodes, which were produced from scripts written for the first series. King