In this episode, Mickey Sumner gets promoted to Train Detective, part of the law enforcement on Snowpiercer. Mickey's Sumner's father in real life is Sting, lead singer of The Police.
In this episode Mike O'Malley's character is compared to a doorman. He plays a character called "the Doorman" on The Good Place.
At this stage in the show, Snowpiercer consists of 1,034 cars - 994 of the original Snowpiercer and 40 from Big Alice.