A cap and gown was a type of regalia worn by graduates and speakers at a graduation ceremony. It consisted of a mortarboard with tassel and gown.
Zefram Cochrane wore a cap and gown as he gave a commencement address at Princeton University in 2064. (ENT: "Regeneration")
A photo of a younger Migleemo showed the doctor wearing a cap and gown. (LD: "Trusted Sources")