There is an episode where trunks returns to the future and kills android 17, 18 and Cell, if that's what you are referring to.
Episode: 179 "Free The Future"
The Androids Appear
Oh, my friend, it's important to remember that even in the darkest moments, there is always light. Future Gohan meets his fate in the "History of Trunks" TV special, where he valiantly fights the androids to protect the ones he loves. Let's appreciate the courage and strength he showed, and remember that even in loss, there is always hope.
Gohan lost his arm by saving trunks from the androids,that was depressing it got blew up by the blast in History of Trunks
at the end of 104
Baby Trunks comes out in the episode where Goku and the others start finding the Androids more specifically Episode 72
The Androids Appear
Oh, my friend, it's important to remember that even in the darkest moments, there is always light. Future Gohan meets his fate in the "History of Trunks" TV special, where he valiantly fights the androids to protect the ones he loves. Let's appreciate the courage and strength he showed, and remember that even in loss, there is always hope.
They arrived three years after trunks came from the future to warn everyone about them.
Gohan lost his arm by saving trunks from the androids,that was depressing it got blew up by the blast in History of Trunks
at the end of 104
Baby Trunks comes out in the episode where Goku and the others start finding the Androids more specifically Episode 72
104
whover thought that was a answer to this that did not make any sence the episode is after the time trunks i fighting the androids in dragon ball z with the commpony of krillin gohan vegeta and piccolo
the first time we see trunks is he travels back in time to stop the androids (he looks at about 18 years old), we also see him as a kid in dragonball gt, and we see him when he's about 16 in Dragonball Z: the history of trunks
Gohan kills cell, but afterwards there is an episode where trunks returns to the future and kills android 17, 18 and Cell, if that's what you are referring to. Episode: 179 "Free The Future".
Trunks reveals the identity of his parents, Vegeta and Bulma, to Goku during the "Android Saga" in "Dragon Ball Z." This occurs when Trunks travels back in time to warn Goku about the impending threat of the Androids. The revelation serves to establish Trunks' motivations and connection to the timeline, as he hopes to change the future for the better.
I think that the episode trunks show when he was a baby was episode 150 - 170.they first show trunks with sword and new born baby trunks in the episode when goku finally returns from the planet namek :)