ReBoot/Tear Jerker

""Bob always stopped us before we could do anything really bad. Now, nobody does.""
 * 's Heroic Sacrifice in Season 4.
 * *sniffle*
 * The ending of "Web World Wars", after
 * Two moments from "Game Over":
 * The scene where Dot is weeping after destroying Megabyte's fleet.
 * The ending. Made even worse by everybody's shocked silence after they hear the words, only to have it broken by Dot's grief-stricken scream.
 * Surprisingly, Slash gets a minor moment when he laments the way things have been going in Mainframe lately.

""Uh, hi..... sis.""
 * The moment where Enzo,  is a tear-jerker of a heartwarming sort.