while sleep and mr. eko be assign by his brother yemi ( adetokumboh mccormack ) in a dream to go with john locke to disclose the meaning of the . symbol . with the pretext of chase henry and mr. eko bring john with him and they find a second hatch call pearl underground the question mark symbol mark on the field and where a video explain that the other hatch be a psychological experiment and people behavior press the button of the computer every 108 minute be actually subject . meanwhile and jack unsuccessfully try to save libby . in this episode and john locke lose his faith in the island when he find that they have be monitor in the hatch . the disgusting michael see the anguish libby wishing that she be dead and while hurley and jack and kate and sawyer be suffer her pain and in a deep emotional contrast . my vote be eight . title ( brazil ) represent not available .