Here is an idea for a 50th special though it may be too late and I'm unsure how to get it to the power to be and who. I got it from listening to the extra on the audios of the lost episodes. It would be a two parter. Each would have to be 2 or more hours long, I would think, to give everyone a chance to have his/her say. Part 1: Some type of intergalactic news reporter/investigator is doing a report on the Doctor for a very advance civilization. This person goes around and round up all of the companions (who the actors are left from the 1963 & 2005 show) and interview them on why they went with the Doctor,their time with the Doctor, why they left and their lives after the Doctor. This person could have the power to restore the memories of Jamie, Zoe and Donna. There could even be away to work Adric, Katarina and Sara Kingdom into the mix. Maybe a 2nd interview with those who have died. Part 2 A round table with all the actiors talking about their time before, during and after Doctor Who. A 3rd special to cover those we have lost over the years.
E-mailed BBC Worldwide Productions with this. Nothing may come of it but maybe in the next year or two at the end of the show DVD run they need an idea for a DVD extra.