Sam Catchem is a character in Dick Tracy. He was played by actor Seymour Cassel.
Sam was shown as being one of Tracy's partners, along with Pat Patton, under the command of Chief Brandon. He was well-meaning but not especially relevant to the plot, though he did participate in the New Year's Eve shootout at Club Ritz.
In the scene where The Kid is awarded a a special certificate of commendation, he is told it is only temporary unless he chooses a proper name for himself. Sam says he never had that problem as like most people, his parents named him at birth. When the Kid asks if Sam were in his situation and had to name himself what it would be, to which Sam replies "Sam".