As we flash forward to present day and Rick’s group using whatever bits of metal they are able to discover in the train car to get ready for conflict, we are aware the current “bad guys” did not start out as such, but their activities make that difficult to believe. Glen, Bob, Rick and Daryl are taken from the vehicle, tied, gagged and knelt before a trough with other prisoners to be methodically slaughtered like pigs. Before we find a guy ‘s throat slit we are not even five minutes into the episode and it becomes clear that these folks are cannibals. Cannibals. Who fight with zombies.