Although the Star Trek (1966) edition "Plato's Stepchildren" is commonly held to have featured TV's first interracial kiss, that was only the case on US television. Episode 724 of E-W10, transmitted in July 1964, had featured such a scene over four years previously, when a long-burning romance blossomed between Louise Mahler (Joan Hooley) and Giles Farmer (John White). Some sequences were carefully toned down before transmission.
The closing signature tune to E-W10, "Silks and Satins" by Peter Yorke, was a stock library track and so able to be used by any production company. As a result of this, the piece was often heard on Prisoner (1979) as an 'old film theme' when the women of Wentworth Detention Centre were watching TV.