There's at least one other mention in Classic Who (in "Full Circle", where it's a plot point that instead of Gallifrey they end up at the inverse of those co-ordinates), but I think this is the first time it's come up in New Who.
It's the kind of random throwaway gift to the Classic fans that I love. Besides, why make up coordinates to Gallifrey when we already have some? (But it's so great that Moffat knows we already have some!)
(no subject)
Date: 2014-11-09 01:04 pm (UTC)(no subject)
Date: 2014-11-09 01:20 pm (UTC)There's at least one other mention in Classic Who (in "Full Circle", where it's a plot point that instead of Gallifrey they end up at the inverse of those co-ordinates), but I think this is the first time it's come up in New Who.
(no subject)
Date: 2014-11-09 03:40 pm (UTC)(no subject)
Date: 2014-11-09 07:30 pm (UTC)(no subject)
Date: 2014-11-09 07:31 pm (UTC)(no subject)
Date: 2014-11-09 07:33 pm (UTC)