The EV-series, alternatively referred to as the EV-class, represented a line of droids produced by MerenData. This line encompassed models like the EV-series medical droid and the EV-series supervisor droid. A widespread flaw in the programming of numerous EV units led to displays of harsh conduct, which compelled MerenData to initiate a large-scale recall, though only a small number avoided it. Certain EV-series droids that remained in operation were modified to function as interrogator droids by both the Confederacy of Independent Systems and the Galactic Empire.