Shortly after the Transformers movie the one that wasn ' t shite came out , Marvel UK introduced Unicron or what was left of him into the comics and , in the same storyline , an interplanetary bounty hunter known as Deaths Head . IIRC he had been hired to take out Ultra Magnus . Deaths head was a very popular character and they were the sole rightsholders , so they wanted to spin him off into his own comic without the transformers . The only problem was that he was the same size as your average transformer about 2030 ft this made it a bit tricky to integrate him with their other characters . The solution was a short story in one of their specials in which Deaths Head crashed into the Doctors Tardis in an interdimensional nexus . There was a bit of a misunderstanding and the Doctor had to zap him with the only weapon he had to hand , the Masters tissue compression eliminator . This shrank Deaths Head down to normal human size . While he was disorientated , the Doctor sent him back to his own dimension . It later turned out that it wasn ' t his own dimension , but earth 616 and he woke up on the roof of the Baxter building , home of the Fantastic Four . Actionforce and therefore GI Joe also crossover via the Transformers UK comic and some subtle hints in the cartoons .