Steven Mond

Diff'rent Strokes · S5, E1

Shoot-Out at the O.K. Arcade

Arnold challenges Willis to a video-game showdown.
Diff'rent Strokes · S3, E13

Junk Food

Arnold's poor dental checkup and a visit by health-minded Aunt Sophia spark Drummond's crusade to rid the school of junk-food machines.
Diff'rent Strokes · S4, E13

Kathy

Arnold motivates a disabled girl to use crutches, while she encourages him to participate in the school play.
Diff'rent Strokes · S5, E19

Hall Monitor

Kathy transfers to Arnold's school and is treated very poorly. When she becomes hall monitor, she doles out demerits to everyone except Arnold. Arnold tries to get Kathy to lighten up but instead is hard on Arnold too.
Diff'rent Strokes · S5, E6

Substitute Teacher

Kareem Abdul-Jabbar plays an overzealous teacher who isn't scoring points with Arnold and Dudley.
Diff'rent Strokes · S2, E23

Teacher's Pet

Classmates tease Arnold when Drummond starts dating the teacher.

Guest Appearances