Hetocumtek is the main antagonist of The Sarah Jane Adventures episode "The Curse of Clyde Langer". He appeared to be a normal totem in a museum, but was actually an alien. Sarah Jane Smith and her gang became suspicious when fish fell from sky like the rain. In the museum Sarah Jane, her adoptive daughter Sky and their friends Clyde and Rani came to see Hetocumtek but when Clyde made a fool of himself and got a splinter, he was unaware that he had woken up the evil god.
In legends, Hetocumtek was so evil, that he wanted to make all humans his slaves forever. But a shaman finally imprisoned Hetocumtek in a totem for good. He was now awake again and put his curse on Clyde and make everyone he loved hate him (including his mother Carla, Sarah Jane and Rani). Sarah Jane finally found an alien energy in the totem. Hetocumtek became stronger after Clyde got away from his town. Sky was the only one not to be affected by the curse and with help from Sarah Jane's computer Mr. Smith, broke Sarah Jane and Rani from the curse by having them say Clyde's name.
The trio found Clyde and took back to Sarah Jane's home where Mr. Smith teleported Hetocumek there where Clyde was able to defeat him by saying "My name is Clyde Langer". The destruction of Hetocumtek also broke the curse and restored Carla's love for Clyde.