Firstly, if you haven’t seen The Middleman, go correct that by any means necessary. One of the greatest geek-appreciation shows in history and, sadly, yet another victim of single-season cancellation.
Once you’re done with The Middleman (is anyone ever really done?), check out this little piece of fan-fiction from Middleman series creator Javier Grillo-Marxauch (typed that from memory!) in which the titular Middleman and his lovely assistant, Wendy Watson, cross paths with the Doctor.
It’s a really fun, all-sorts-of-rollicking adventure that still has time to have a heart. Absolutely great stuff!