Synopsis:
Looker rescues Batman, while Karlo forces Doctor Lowell to combine the blood samples that he stole from Payne and Fuller and uses the mixture on himself to become the ultimate Clayface. Meanwhile, Payne and Fuller escape and find that they have feelings for each other.
Notes:
By injecting himself with a mixture of blood from Payne and Fuller, Basil Karlo gains the shape-changing powers of Clayface 4 with the burning touch of Clayface 3.