|Biological type:||Mutated Thals or Kaleds|
|Place of origin:||Skaro|
|Appearances:||TV: Genesis of the Daleks|
Mutos generally looked like lumpy Thals or Kaleds, but the mutations could vary widely. The Mutos lived in the wilds of Skaro, trying to scrape out an existence in the radioactive wastelands and were often hunted by Thals for use as slave labour.
Once an individual became mutated, he was forced out onto the wastes by his deformity-free comrades. Mutos were hated by both sides. The Kaled mutos were driven out to maintain racial purity among the ranks. The Thals used them for slave labour, particularly for dangerous jobs.
The Thals mistook Sarah Jane Smith for a Muto when they found her in the wastes. After finishing their neutronic missile, the Thals had Mutos load it without protection from the radiation used in its construction.