In 2002, Manzarek and Krieger (The Doors) reunited and produced a new version of The Doors, called The Doors of the 21st Century. The lineup was fronted by Ian Astbury of The Cult, with Angelo Barbera from Krieger's band on bass. At their first concert, the group announced that drummer John Densmore would not perform; it was later reported that he was unable to play because he suffered from tinnitus. Densmore was initially replaced by Stewart Copeland of The Police but after Copeland broke his arm falling off a bicycle, the arrangement ended in mutual lawsuits, and he was replaced by Ty Dennis, who was the drummer with Krieger's band. Densmore subsequently claimed that he had in fact not been invited to take part in the reunion.[citation needed] The newly configured group performed on several TV shows including The Late Late Show with Craig Kilborn.

They have also been known as D21C, and Riders on the Storm, but have recently been using the moniker Manzarek-Krieger or Ray Manzarek and Robby Krieger of The Doors for legal reasons. They perform Doors material exclusively.