Dredd is relaxing, reading a law book, in his apartment when he is rudely interrupted by a 'Sensor-Round' display. Maria, Dredd's cleaning lady enters the room with one Kevin O'Neill, the Senor-Round salesman. Dredd wants the 'ferret faced parasite' thrown out of his apartment. Maria nags Dredd, all he ever thinks of is the law and never has fun.
A group of citizens enter Dredds apartment. Dredd isn't too pleased until one of them tells Dredd why. There has been a murder on the 200th floor - the President of Sensor-Round is dead!
Dredd investigates. It seems the President has been killed by some 'monster!'.
Over the next few days other top Sensor-Round executives meet strange deaths.
Dredd is on patrol when he gets a call from HQ saying that they have identified a voice print from the scene of the last murder. The voice belongs to the curator of the Movie Special Effects Museum. Dredd decides to pay the curator a visit.
At the museum Dredd sees bloodspots on the robot 'monsters'. Everything makes sense to him now. The curator has been using these movie monsters to kill the Sensor-Round executives. The curator and killer turn out to be the Sensor-Round salesman - Kevin O'Neill!
O'Neill confesses to Dredd. He killed those executives because they ruined the movie monsters of old. Nobody wants to see those monsters anymore because Sensor-Round offer dream-worlds in their stead. O' Neill flees. Dredd follows in pursuit...but O'Neill has activated the greatest movie monster of them all - Krong!
The mechanical monster breaks out of the museum and smashes his way across the city to destroy the Sensor-Round building. Dredd follows in his lawmaster desperately trying to stop the giant robot ape.
Krong reaches the building and begins to climb it - ripping it apart at the same time.
The only way Dredd can stop it is by ramming his lawmaster down it's throat! It works and the creature falls landing on a hapless Kevin O'Neill.
Even though he left 2000ad, Carlos Ezquerrah came back to do this strip. This is his first published Dredd.
The 'Robot Ape' story was inspired by the 1976 remake of King Kong and the 'Kevin O'Neill' character in the strip was named after 2000ad's Kevin O'Neill. O'Neill was heavily into movie special effect back then and had even done a King Kong fanzine.
This story also contains the first appearance of Maria, Dredd's landlady. Although here she's referred to as a cleaning lady. Maria was introduced to give Dredd a mother figure and some sort of balance. Dredd was so robotic that Mills felt that Maria would humanise him more.