I'm not really understanding the argument on how Stepney would be "perfect" for the 75th anniversary. I mean he only had 5 episodes with a major speaking role. Plus he's not even in the show anymore. Unless he's brought back, it's probably highly unlikely that we'll get bachmann Stepney. But like I said, I'd love to be wrong. Now with Ryan, he's very relevant in the show and has appeared in a movie.