Board Thread:The Reference Desk/@comment-172.7.49.112-20160802214828/@comment-188432-20170530185823

AeD is of course correct to point out that no specific date has been given. However, there was a scene in The Stones of Blood that was to have had Romana I giving the Doctor a birthday cake. This is because TSOB part 4 was broadcast in the same week as the 15th anniversary of the programme. The scene got a fair bit of work from a few writers, and they actually ordered the birthday cake. However, prior to filming, Graham Williams nixed the idea, and so the crew had to eat the cake.

The only real remnant of this idea is an off-hand remark in The Power of Kroll, a few serials after TSOB, in which Four claims to be "nearly 760".