Fans asked for it and Supernatural delivered … kind of. After bouncing the role among various guest stars and series regulars, Mark Pellegrino has returned to Supernatural as Lucifer. The original Lucifer, and in many fans’ estimation the best, is back and it should be a cause for celebration. Yet Supernatural has wasted the return of the former Lord of Hell in the second half of season 12. Supernatural has a Lucifer problem and it needs fixing.