Coil is supervillain who is an enemy of Dial H For Hero and a character in the Dial H For Hero comics by DC Comics. Coil can extend and compress his body like a coil spring, hence his name. He is once a servant of a villain called the master.
He kidnappes detective Greg King who is the local police detective in the city of Fairfax and holds him captive. However Chris King and Vicki Grant in their hero forms are able to defeat him and free his prisoner.