Jack Laser

From Tardis Wiki, the free Doctor Who reference

Jack Laser was a character in a show created by Trans Gal, played by Nick Kenton. Even though he was fictional he could lead a life of his own within the dimensional bubble where the television programme took place. He killed Lord Krarn's wife. When he managed to get out of the programme, he helped the Sixth Doctor defeat Lord Krarn and the Porcians. (AUDIO: The Fourth Wall)