Peaked hat
From Tardis Wiki, the free Doctor Who reference
Captain Tallis wore a peaked hat. (AUDIO: The Light Keepers)
Brigadier Lethbridge-Stewart wore a peaked hat. (TV: Spearhead from Space-Battlefield)
Group Captain Gilmore wore a peaked hat when he met the Seventh Doctor, Ace, Imperial Daleks, and Renegade Daleks during the Hand of Omega Incident. (TV: Remembrance of the Daleks)
Colonel Alan Mace and Captain Marion Price wore peaked hats during the 2009 Sontaran Invasion of Earth. (TV: The Sontaran Stratagem|The Poison Sky)
The Spy Master wore a peaked hat as part of his Nazi costume on World War 2 Paris. (TV: Spyfall)
The commanding Eternals of the Shadow including Striker and Marriner wear peaked hats. (TV: Enlightenment)
