Dragonball kai episode 52

Description : Two Remain on a Vanishing Planet! This Is the Final Showdown As the battle continues, it seems neither warrior is going to win before Namek's explosion. However, Goku soon notices that Frieza's power is quickly decreasing, due to the protracted battle wearing him out. Satisfied that he has won, Goku decides to call it quits and begins to depart towards his spaceship. Unable to accept this, Frieza launches a pair of heat-seeking Ki disks at Goku. The Super Saiyan manages to avoid this, however, and eventually Frieza is sliced in half by his own attack.