Windmill was the call sign of several UNIT helicopters including Windmill 11, (TV: The Day of the Doctor [+]Loading...["The Day of the Doctor (TV story)"]) Windmill 123, (TV: Doctor Who and the Silurians [+]Loading...["Doctor Who and the Silurians (TV story)"]) and Windmill 347. (TV: The Mind of Evil [+]Loading...["The Mind of Evil (TV story)"])