Marc, played by Burke Roberts, is a character in the television series Buffy the Vampire Slayer.
Marc is a demon who is killing students who are taking part in the school talent show. When student Emily Djiemanowicz is found with her heart removed, Buffy Summers thinks Sid the Dummy is somehow responsible. However, Sid is a demon hunter trapped in the dummy and he thought Buffy was responsible. The two work together to track down the real demon, Marc.
Buffy, with the help of Xander Harris beheads him and Sid stabs him in the heart killing him and removing the curse, allowing Sid to die as well.