This time of year is so great because it brings back the trenchcoat, which Wikipedia tells me was designed by Thomas Burberry - the inventor of gabardine (who knew?) in 1901...amazing. The trenchcoat still looks fabulously chic over one hundred years later!
My favorite way to wear it is with a simple black turtleneck, very spy-lady...

Or buttoned up with cigarette pants, high heels, and a clutch bag...

Or with a black & white striped bateau shirt and a wide patent belt...

Or "hipster" style with checked Vans and leggings...

Or perhaps as a ballgown?