"Doctor, the Professor will see you now. Again."

I know, I'm late to the party described herein, but as delineated in the text, time is obviously more wibbly-wobbly than even The Doctor might have surmised.  Here is a news story from the BBC detailing the bounce-back of television signals being received Earthside on radio telescopes.

Of particular interest; the lost episodes of Doctor Who... ones for which there were no surviving recordings... Even more timey-wimey is the fact that the news story was posted in 2009 and references television signals as 47 years old at the time of the report... meaning that the reconstructed episodes they are currently restoring are becoming viable, "regenerating" if you will, just in time for the Doctor's 50th anniversary.

Now pardon me while I leave you to read the link for yourselves.
~toddles off singing to the tune of Frosty the Snowman... "There must have been some chronotons in that old blue box they found..."~

http://www.rimmell.com/bbc/news.htm