Episode 4x7, Ji Yeon
On the freighter, Ray calls Kevin over to mop the room where Sayid and Desmond are going to stay. He makes some excuse, but Ray insists, and when he comes into view, we see that it's Michael. Sayid doesn't give him away and shakes his hand as Michael says his name is Kevin Johnson.Episode 4x8, Meet Kevin Johnson
Sayid confronts Michael about how he got on the freighter. Michael tells him how Tom found him in Manhattan and told him about the fake wreckage and sent him undercover onto the freighter.Sayid takes Michael to the captain and rats him out, telling the captain that Michael was on Flight 815 and then the island and that he is the one who sabotaged the radio and engines.
Episode 4x11, Cabin Fever
Keamy storms into Michael's room and asks if Michael was the one who told Ben all about Keamy. Michael admits that he was and Keamy kicks the bed so that it falls on Michael's legs. He tries to shoot Michael, but the gun won't fire.Captain Gault says they need Michael to fix the engines because he's the one who broke them.
Later Frank comes in and asks why Michael didn't tell him he was a survivor of 815. Michael didn't know if he could trust him. Frank takes Michael out of his room.
Episode 4x12, There's No Place Like Home Part 1
When Jin and Sun get on the freighter, Michael tries to explain how he got back home and that he came back for them to undo what he had done.Episode 4x13, There's No Place Like Home Part 2
Michael sprays the bomb battery with liquid nitrogen to freeze it and keep it from detonating. Desmond and Jin try to deactivate the bomb, but are unsuccessful. Michael tells Jin to go.Christian Shephard appears to Michael and tells him he can go now and then the freighter blows up.
