 The Earth @-@ human head of the hospital 's Psychology department , his job is to ensure that the hospital 's diverse species work together as harmoniously , efficiently and safely as circumstances allow , and particularly to save the staff from being driven insane by over @-@ use of Educator tapes . Since he is a very acute observer of behavior and often uses sarcasm " to shrink heads , not swell them " , he is sometimes called a " latter @-@ day Torquemada " . 
