Lost (2004)

S1E7 The Moth

Charlie embarks on a difficult path to overcome his drug addiction, receiving unexpected support from Locke, whose reasons for assisting him remain unclear. At the same time, the other survivors are in a race against time to rescue Jack, who is trapped underground after a cave-in. Additionally, as Sayid, Kate, and Boone work together to track down the origin of the French transmission, they sense that someone may be covertly sabotaging their efforts.