When Arthur comes back after failing his driving test, he sarcastically comments that he knows what a yellow light means. Arthur is played by Judd Hirsch, who played Alex Reiger in Taxi (1978). One of the most well-known episodes of the series, Reverend Jim: A Space Odyssey (1979), has Reverend Jim (played by Christopher Lloyd) taking a driving test and asking his co-workers what a yellow light means.