A mysterious man keeps luring people into dangerous situations where they ultimately get killed after they called 911 and asked for help.Grave Digger eventually calls Mac who asks him questions about his father who died of cancer also which give us a flashback where you can see a younger Mac in a military uniform talking to his dad on his death bed.The villain is finally revealed and we understand that he killed the doctors and nurses who were unable to help him due to insufficient health insurance for a better treatment that could have saved his life.Taylor closes the episode by saying that if you need better health-care call your congressman and demand that the government does something about it.