The Avengers, series 4 episode 26 'Honey For The Prince': A dress worn by Diana Rigg as Mrs Emma Peel, March, 1966, comprising a full-length ivory dress, with floral lace overlay on the top half and a bow at the waist, accompanied by a plain rectangular wrap of the same colour and fabric, with designer's label on the inside of the dress (2)
FOOTNOTES
Designed and made by Jean Varon, and worn by Diana Rigg as Mrs Emma Peel in episode 26 when Genie brings Steed and Emma to a fantasy world of cricket, harem dance, and creative assassination.
Diana Rigg can be seen wearing this dress during the first 10 minutes of the episode.
https://www.youtube.com/watch?v=UKVLlHyWKSA