Bowl a maiden over

When searching for a new outfit in the TARDIS wardrobe, the Seventh Doctor donned the Fifth Doctor's cricketing outfit and asked the Rani whether the outfit would bowl a maiden over. (TV: Time and the Rani)

Behind the scenes
The phrase has two meanings in English, both of which were intended by the scene. The original, cricketing meaning is to bowl an over without allowing a single run — a "maiden over". The other meaning was to impress a young woman, as in to "bowl someone off their feet". In this case, the "maiden" was Mel, to whom the regeneration-addled Doctor thought he was talking.