Porcian
The Porcians were a porcine species. They wore silver body stockings and capes.
Their incompetence at invading other planets was the cause of amusement throughout the galaxy. They would target worlds whose suns were about to go supernova, or ones where they were hopelessly outclassed, like Skaro. They often destroyed their own invasion fleets. The Doctor encountered them frequently, attempting to minimise the damage to themselves and others as much as possible. (AUDIO: The Fourth Wall) He believed there was never any real rush to defeat the Porcians, as opportunities would present themselves without much intervention. (AUDIO: You Are the Doctor)
The Master once worked with the Porcians. He later believed it to have been a mistake on his part. (AUDIO: Master of the Daleks)
The Seventh Doctor considered them to be "the most inept alien invaders in history". (AUDIO: You Are the Doctor)
