Wondering how The Doctor's alien buddies manage to pal around in Victorian England undetected? The latest Christmas minisode explains it all! This short little video, set up as a prequel to the upcoming Doctor Who Christmas Special, shows how Vastra and Strax have been getting by in the past looking the way they do. The whole short is very sweet - we would happily watch a "Vastra Investigates" spin-off web series.

[via Bleeding Cool]