Dr. Ethan Goodspeed, also known as Ethan Rom, is a fictional character portrayed by William Mapother on the ABC television show Lost. Introduced in the first season as the main antagonist, Ethan is the surgeon for the antagonistic and mysterious group known as the "Others". He infiltrated the fuselage survivors, posing as one of them until they discovered his true identity. He then kidnapped Charlie Pace and the pregnant Claire Littleton, attempting to dispose of the former soon after.