For Halloween this year, I was Bill Nye, The Science Guy:

Nikkor @ 25mm || 1/160 || f/25 || ISO200 || flash with snoot || tripod
I was not in possession of bow-tie at the time I took this picture, so the look is a bit incomplete. But I think you can get the jist of the outfit. Total cost of costume: $0.00. Thanks to Charity Braz (for the scientists coat) and Jens Jensen (for the bow-tie, not pictured).
On a side note, I think it was apropos that I went as Bill Nye. We both are engineers, we both work(ed) at Boeing, and we both lived in Seattle. Although, I’m not anywhere near as cool as Bill.
amazing photo!
Doctor Who