Mortar board
From Tardis Wiki, the free Doctor Who reference
The newly regenerated Seventh Doctor tried on a black mortar board and academic gown from the TARDIS wardrobe. Hoping she would contradict him, he commented "a little portentous perhaps" to Melanie Bush, actually the First Rani in disguise, before dispensing with them whilst the Rani remarked behind his back "pretentious is the word." (TV: Time and the Rani, PROSE: Time and the Rani) As John Smith, he wore a mortar board when teaching history, specifically that of the Bronze Age, at Hulton College in Farringham, Norfolk, during 1914. (PROSE: Human Nature)
