The puppet is a personal favorite of Paul Rugg, who performs him as a particularly mad scientist.
Dr. Scientist appeared in Neil's Puppet Dreams as Dr. Feltman (performed by Allan Trautman) and re-appeared in That Puppet Game Show as Dr. Strabismus. The puppet also appeared in The Happytime Murders as a puppet doctor (performed again by Allan Trautman) who refused to operate on Connie Edwards.
The puppet was designed and built by Drew Massey.