The Girl from U.N.C.L.E. stars Stefanie Powers as American U.N.C.L.E. agent April Dancer and Noel Harrison (son of Rex Harrison) as her British partner, Mark Slate. Leo G. Carroll plays their superior, Alexander Waverly. The character name "April Dancer" was suggested by James Bond creator Ian Fleming who was a consultant in the creation of the parent program shortly before his death.
The series was not as successful as its parent program and was cancelled after 29 episodes due to low ratings. Several crossover episodes were produced in conjunction with The Man from U.N.C.L.E., including the episode that introduced April and Mark. In their first appearance they were portrayed by Mary Ann Mobley and Norman Fell, respectively.
Similar to the later spy series Alias, April Dancer often went on undercover missions where she had to affect a foreign accent (Powers is fluent in several languages). Her dance training was also put to good use in several episodes, particularly "The Mata Hari Affair" where Powers recreated the dance performed by Greta Garbo in the film Mata Hari (1931).
Another feature was the sometimes outlandish avant-garde outfits worn by Powers intended to make her appear hip and modern. She was featured on the cover of TV Guide (December 31, 1966 – January 6, 1967), and the article on her mentions the show "...allocating roughly $1,000 an episode for stretch vinyl jackets and skirts, a bare-midriff harem-dancer outfit, miniskirts and the latest mod fashions from Swinging London's Carnaby Street."
The article also underscores the show's major flaw: "Unlike her fellow U.N.C.L.E. agents, the ladylike April is not required to kill the bad guys. Her feminine charms serve as the bait, while her partner Noel Harrison provides the fireworks. She does carry, however, a perfume atomizer that sprays gas, earrings and charm bracelets that explode, among other interesting gadgets."
In contrast to her keen martial arts contemporaries, the lead character in Honey West and Emma Peel in The Avengers, the more demure conception of April Dancer weakened the character and often turned her into a helpless damsel-in-distress. Arming her with gimmicks and gadgets was not enough.