Splicers

"Splicers" is the first episode of the second season of Batman Beyond. It depicts the trouble Gotham faces when a new fad arrives in the form of "Splicing." After a scientist, Dr. Able Cuvier introduces a system of combining animal DNA with human DNA; it becomes a trend amongst the people of Gotham. However, D.A. Sam Young works to outlaw the practice and is marked for death by Cuvier. Now Batman must deal with people enhanced with animal capabilities