The customer who wants to return a tarp that has blood on it was the same customer from New Initiative (2018) who said he was going to have dinner with his mom and was buying a shovel, duct tape, kitchen knives and tarp, and asked Glenn where the bleach was.
Amy's fake name tag says "Adenike".
At the end of every episode, the card for the production company Spitzer Holding Company features a variety of items they specialize in. In this episode they list Spare Tires, Spare Change and Semi-Retired.
Marcus is revealed to be living in a hidden room in the store's access tunnels. He was previously said to still live with his mom. It is never revealed what happened to his previous living situation.