We find out that Harper can speak and understand Spanish, meaning that he has understood all the mean things Angela has said about him.
Wyatt went to grade school at a place called Westbrook Academy.
Sack spikes Angela's coffee with sorbitol, a common sugar substitute for diet foods (like sweetener). In large amounts, sorbitol causes diarrhea, and it is used in hospitals as a remedy for constipation in therapeutic doses.
Life Shield is in competition with another company named NMR.
The ambulance company that the paramedics work for is named LifeShield. Cole and Hallon drive rig 712 and de la Cruz and Sims drive rig 73.
Wyatt doesn't wear gloves while delivering the baby in the middle of the episode, a mistake that would get him fired in real life.
The song that "John the Baptist" was singing when he stole the bus was Love Machine by the Miracles.