The Rat King came across Splinter as the mutant rat lay injured in the sewers, and he wouldn't stop trying to convince Splinter to eat other (non-mutant) rats in order to survive, rather than just ...

When his brothers finally reunite with him, an unhinged Donatello declares, "Master Splinter is back from the dead!" Donatello is referring to a dead, decaying rat on his shoulder, and he's the ...