Frieza does not get killed by Goku. Future Trunks is the one to kill Frieza.
Chat with our AI personalities
Frieza 100% it is obviously shown when Frieza killed Goku. I forget which episode but when Frieza 100% was fighting ssj Goku and he killed him by drilling him into the lava and then sending energy blasts down the hole. Coincidentally, the wish to restore everyone killed by Frieza and his men, restoring Goku. Not only that but because of the saiyan's natural zenkai he got a boost in power. This allowed him to defeat Frieza since he had been damaged by ssj Goku's attacks and because of the power loss due to using 100% power.
Goku returned from defeating Frieza in episode 121 of season four after Trunks chopped Frieza into pieces and blasted him along with his father King Cold
First goku killed frieza on planet Namek then his dad fixed him and trunks (future trunks) killed him.
frieza killed krillin on planet namek when goku tried to hit him with the spirit bomb but failed also when krillin was killed goku turned super saiyan for the first time
They show how he got back in the episode when he returns to Earth which the episode is called Mystery Revealed.