text: June Whitfield (1925–2018) (4) After a support role in Nurse she returned much later for lead roles in Abroad as a prudish, nagging wife, and an equally strait-laced character in Girls (in which she also dubbed the dialogue for Valerie Leon's character). These roles were similar to Hattie Jacques' early performances. She returned for Columbus in the role originally ear-marked for Joan Sims.
  Esma Cannon (1905–1972) (4) Australian actress who had small roles in Constable & Regardless and had larger roles in Cruising & Cabby.
  Larry Dann  (born 1941) (4) had a small role as a student in Teacher (1959). Returned much later for support roles in Behind (1975), England (1976) and a main role in Emmannuelle (1978).
  Liz Fraser (1930–2018) (4) joined the series in Regardless and continued until Cabby. She returned 12 years later for a supporting role in Carry On Behind.
  Dilys Laye (1934–2009) (4) made her first appearance in Cruising. Also appeared in Spying, Doctor and Camping.
  Angela Douglas (born 1940) (4) played leading roles in Cowboy, Screaming, Follow that Camel and Up the Khyber.
  Julian Orchard (1930–1979) (4) made an uncredited appearance as a rake admiring Joan Sims' cleavage in Don't Lose Your Head.  He followed this with a small role in Follow That Camel, and more significant supporting roles in Doctor and Henry.