"The End of All Things, Part 1"
*At the funeral of Oliver Grayson, Allen the Alien expresses his sympathy to Mark, which pushes Mark over the edge. A fight breaks out at the ceremony, and just when it seems that Mark's uncontrolled anger can't be stopped, Atom Eve shows Mark a thing or two about throwing a fit. Once things have settled down, Mark and Eve know what must be done. They must hunt down and kill Thragg. Before they do, there is some unfinished business, that of their marriage. Later, Allen the Alien reveals to his wife in private a horrible truth; one that, if it sees the light of day, will rock Invincible's world. *Source: Warlock