I saw McGann in a Poirot episode playing a Doctor the other week and giggled all the way though. Oh, you should look up the Mrs Bradley Mysteries series, both Tennant and Peter Davidson are in it, and they're utterly brilliant. I'm pretty sure you;d like the series as a whole.

He was in 28 Days Later? I've only half seen that so I probably wasn't paying attention...

I know, thats why I said that :p He was awesome in All Creatures though...