This Doctor Who screencap contains
fedora, cappello di feltro, homburg, stetson, and stetson trilby.
There might also be
porkpie, cappello porkpie, porkpie hat, completo, vestito di affari, cappello campagna, and cappellone.
Basically the story of his three companions, Rose, Martha, and Donna, and how they can never stay with him long, and the Doctor has to let them go. Made da zcatz.