Detective robot
From Tardis Wiki, the free Doctor Who reference
Detective Robots were the law enforcement agents of Sunset Strip. These small androids were immensely durable due to their hollow body casing which being made of duralinium doubled as secure containers. They were the product of Acme Industries, Brentford, Earth. Several of the Detective Robots were often in the pay of the gang bosses and used as minders/protective agents. Thanks to the Doctor they were able to break their programming with the code 5678/2345 Alpha Delta Alpha, which gave them a renewed purpose to clean up the gangs and restore some sort of law and order. (DWAM: Gangster's Paradise and
Heads You Lose)