 Kate and Sawyer stay at the second triangulation point , while Sayid goes to the third . After learning of Jack 's situation from Sawyer , Kate goes to help , leaving the job of turning on the signal to Sawyer . Charlie <unk> through an opening at the cave and finds Jack , but while doing so , the opening collapses and traps Charlie and Jack inside . Charlie <unk> <unk> Jack 's shoulder back into place at Jack 's request . Jack correctly <unk> that Charlie is suffering from withdrawal , and Charlie assures Jack he 's okay . Kate desperately tries to dig them out along with the other <unk> , while the two worry about losing oxygen . Charlie sees a moth which leads him to an opening and the pair dig out of the cave . 
