When Hurley becomes obsessed with the French woman and heads into the jungle to find her, Jack, Sayid, and Charlie have no choice but to follow. Meanwhile, Locke asks Claire to help build a mysterious item.
On the eve of an election, the Governor asks 5-0 to discreetly investigate the murder of a prostitute found in the bed of a missing Congressman. Meanwhile, Danny goes to court to determine if he will get partial custody of Grace.
Five-0 goes back to school when a college professor is killed and Danny goes undercover as his replacement.
