Detective Harvey Bullock is a minor character in Batman: The Enemy Within. A member of the GCPD, he was a good cop, but willing to go outside of the system to get work done. Bullock became a small hindrance for Bruce Wayne during his time undercover in the Pact.
Harvey Bullock had joined GCPD around the same time as James Gordon, whom he had been closely associated with. After rising up the ranks to Detective, he was constantly passed down for further promotion, due to his questionable methods of law enforcement and constantly being caught drinking on the job. At some point, Bullock was shot in the line of duty, leaving shrapnel in his shoulder that would not be extracted. He was also fitted with a pacemaker for an unspecified heart condition.
Bullock had been active when the Pact launched their attacks on three different areas of Gotham. Like the rest of the GCPD, he responded to the attack on the Gotham City Brokerage, carried out by Harley Quinn. Bullock was placed in charge of the investigation and was later asked to pass on the information to both the Agency and Batman.
Bullock was later reassigned to monitor the Riddler's hideout, though he had agreed to for desperately needed money. During his patrol, he caught billionaire Bruce Wayne breaking into the area. When confronting him on why he had done so, Bullock decided to call in for what he had discovered. However, he failed to notice one of Wayne's accomplices sneaking up behind him to knock him unconscious. Bruce will have the option of letting Bullock be knocked out, even do so himself, or bribing him. If the latter is chosen, Bullock takes the bribe and leaves him to investigate. These actions would later reach Gordon and used as evidence against Bruce Wayne, hoping to justify the billionaire's arrest.
- The following only happens if "John Doe" has become the villainous Joker.
After receiving information about a van stolen by a group of clowns, Bullock, suspecting it to be connected to John Doe and Harley Quinn, decides to follow the lead. Tracing the vehicle to Cathedral Hill, he witnesses the group, including Doe, pick up a drop, but is discovered by the felons. He is quickly ambushed and incarcerated, during which the clowns stuff a jack-in-the-box into his stomach. Left tied up, Bullock is discovered by the GCPD in the early morning.
Believing Bullock to be part of a twisted trap, the officers decide not to cut him down until Batman arrives. Using his cowl sensors, Batman is able to locate the jack-in-the-box and extracts it from Bullock's stomach. Following this, the detective is cut down and receives medical aid immediately. After the ordeal, Bullock requests to speak to Batman and tells the vigilante about what had happened. He also confirmed that Doe had been with the group and points out a crate containing weapons. Bullock is then taken away to receive medical aid at Gotham Memorial Hospital. It is currently unknown whether Joker and Harley Quinn attack the hospital with LOTUS and, if they did attack, whether Bullock survives.
Not much is known about Bullock at this moment in time, but he seemed to be loyal to both Gordon and the GCPD. However, he was willing to take bribes and look the other way, despite knowing that it was not a good idea. Bullock was also very headstrong and would go into situations without back-up. He was also willing to share information when he knew it was important or believed it was worth bringing up.
- Unlike his comic book counterpart, Bullock doesn't seem to hate Batman, even helping him if "John Doe"/Joker becomes a villain.