Jack and Kate's relationship is defined by push and pull. Jack sees Kate as someone worth saving, but Kate resists being saved. Their romance is complicated by Sawyer, who offers Kate freedom from judgment where Jack offers stability and expectation. Off the Island, they briefly have the life Jack always wanted -- but Kate can't stay away, and Jack can't let go. Their final scene together on the Island is one of the series' most emotional moments: Kate tells Jack she loves him, and Jack dies knowing he was loved.

1. S1E1
   Pilot (Part 1)

   Kate sews Jack's wound on the beach. "You don't seem afraid at all." "Well, fear's sort of an odd thing."

2. S3E6
   I Do

   Jack tells Kate to run, sacrificing his own escape for hers.

3. S4E10
   Something Nice Back Home

   Jack and Kate play house off-Island, but it falls apart.

4. S6E14
   The End

   Kate's final "I love you" as Jack goes to his death.

Season 1: instant connection, mutual attraction. Season 2-3: love triangle with Sawyer heats up. Season 4: off-Island relationship crumbles under Jack's obsession. Season 5: Kate returns to the Island to find Claire. Season 6: reunited with purpose -- Kate fights alongside Jack one last time.