S04E08: 'Meet Kevin Johnson'

This impressive episode was a fitting mid season finale for Lost and delivered some much-needed answers.

'Meet Kevin Johnson' served to heighten the speculation surrounding the goodness or badness of certain characters, particularly Ben Linus and Michael Dawson. Both men have committed seemingly despicable acts in the past, but could they both be working under some misguided benevolence? Linus' message to Michael on the boat, in which he claimed to only kill 'guilty' people, was both chilling and fascinating. Charles Widmore has certainly been painted as the bad guy in recent episodes, as Linus' powers of persuasion work on the viewers of Lost as well as Locke's renegade group of crash survivors.

Michael's back story was wisely uninterrupted by frequent trips back to the present. His suicidal plight was well conveyed and there were plenty of shocks and thrills along the way, including the eerie presence of Libby and the tense build up to the non-detonation of the fake bomb. Perhaps the episode's climax wasn't as effective as one could have hoped for, as the collective fates of Alex, Danielle and the ultra-expendable Karl don't rouse a great deal of interest.