Footnote
For our overseas listeners, I think that the good Doctor was referring to the closing lines of that antidote to panel shows, BBC Radio Four's "I'm Sorry I Haven't A Clue", which is traditionally closed by the host using an expression like that. A few of them are collected here, from which I extract this gem:
"As the rogue purple underpants of time begin their assault on the whites-only wash cycle of destiny, and the twin buttocks of fate are sucked into the malfunctioning chemical toilet of eternity..."
... I see that it's the end of the show. Goodbye!