Controller (Basil Sandhurst) is a supervillain appearing in American comic books published by Marvel Comics. The character is usually depicted as an enemy of Iron Man.

Controller first appeared in Iron Man #12 and was created by Archie Goodwin and George Tuska.

Basil Sandhurst was born in Kittery Point, Maine. Sandhurst worked as an electro-mechanical/chemical research scientist. His obsession with control brought his downfall as a scientist when his refusal to obey ethical restraints got him banned from most research facilities. Sandhurst was prone to fits of rage and in an attempt to calm him, his brother Vincent inadvertently triggered a lab explosion, crippling Basil. Vincent, guilt-ridden, outfitted Basil with an automated lab in which Basil bonded a super-strong exoskeleton to his body, powered by the cerebral energies from those around him using his slave discs. As the Controller, he plans to invade and enslave New York City, but Iron Man and S.H.I.E.L.D. agent Jasper Sitwell foil his scheme and leave him comatose. After recovering from his coma, the Controller takes over the Pinewood Sanitarium. He creates an improved set of equipment, but is again defeated by Iron Man.

Months later, the Controller is released from prison by Thanos, who upgrades his technology. Thanos promises the Controller rulership of Earth, and so he begins enslaving dozens of operatives. He invades Avengers Mansion, defeats the Avengers and Captain Mar-Vell, and abducts Lou-Ann Savannah. The Controller's egotistical displays endangers Thanos's security; when the Controller fails to defeat Captain Marvel, Thanos leaves him for dead.

The Controller goes underground for years, upgrading via Stark technology stolen from Justin Hammer, and eventually enslaves a cult. He sets the Blood Brothers against Iron Man and Daredevil. Iron Man defeats him and imprisons him in a vat of experimental plastic, but he escaped. Alongside one of the Blood Brothers, he battles Iron Man, but Iron Man defeats him once more and he is imprisoned in the Vault.

During the "Acts of Vengeance" storyline, the Controller escapes from the Vault and, at the behest of the Red Skull, enslaves Namor and sets him against Captain America. He unsuccessfully attempts to control Loki at the behest of the Red Skull, and unsuccessfully attempts to aid the Red Skull against Magneto. He is ultimately defeated by Captain America.

In the "Secret Invasion" storyline, the Hood hires the Controller as part of his criminal organization to take advantage of the split in the superhero community caused by the Superhuman Registration Act. He appears as part of the Hood's alliance with super-powered heroes; the grouping is intent on defeating the Skrull invasion force of New York City.

Maria Hill finds the Controller holed up in the basement of a Futurepharm facility in Austin, Texas, while on orders from Tony Stark. He has been abducting members of the local populace for months to bolster a new army and attempts to brainwash Hill as well. However, she resists his efforts and frees his drones, sabotaging the entire operation.