I just read this link over at SyFy board (Story is from April 2009), talking about signals aired 47 years previously had bounced back and they were going through them and found Lost Episodes
http://www.rimmell.com/bbc/news.htm
ETA: Oh, I just noticed which day in April 2009
http://www.rimmell.com/bbc/news.htm
A BBC team have been working closely with Dr Venn's team to help recover the signals. BBC Television historian Peter Wells, explained "We now know these are original broadcasts. So far we have recovered about 7 weeks of old television signals from space. Every day in our lab is like traveling back in time. And speaking of which we have just started the digital recovery of signals that contain lost Doctor Who episodes.
ETA: Oh, I just noticed which day in April 2009
