"Ji Yeon" is the first episode since the second season finale, "Live Together, Die Alone", in which Harold Perrineau, Jr. appears as Michael Dawson. Perrineau was the only actor from the original cast of fourteen to not appear in the third season of Lost. Perrineau was "really hurt" by the creative decision to leave him out, and went on to appear in the British horror film 28 Weeks Later and Demons, a pilot for CBS. When the latter was not picked up by CBS, Perrineau returned to Lost; his return was confirmed during Losts slot at the 2007 Comic-Con International.
