A alien bounty hunter.
Oogie Boogie and Hondo hired Cad Bane who was willing to do any job so long as he got paid.
Hiring new members
Abraxxas was asked to join in Cad Bane's little break in. Learning who they were about to attack, he eagerly joined in.
Freeing Mad Doctor
Cad Bane had found what he was looking for in Clu's fortress and freed the Mad Doctor.