Final Crisis: Legion of Three Worlds #4

A great hero falls and another returns to help Superman and the Legion combat the murderous Superboy-Prime. Meanwhile, the Time Trapper makes his move against the three Legion founders, Polar Boy's bizarre mission comes to an end and Superman makes a shocking discovery about the identity of the Time Trapper!

Characters: Adam Orion, Ayla Ranzz, Bart Allen, Black Mace, Blok, Bouncing Boy, Brainiac 5, Chameleon Boy, Colossal Boy, Comet Queen, Cosmic Boy, Cosmic King, Dawnstar, Dream Girl, Element Lad, Emerald Empress, Ferro Lad, Garth Ranzz, Gates, Glorith (Baaldur), Invisible Kid, Ion, Kid Quantum (Jazmin), Kinetix, Laurel Gand, Lightning Lord, Luornu Durgo, Mon-El, Mordru, Night Girl, Persuader, Phantom Girl, Polar Boy, Princess Projectra, Saturn Girl, Saturn Queen, Sensor (Legion), Shadow Lass, Shikari, Shrinking Violet, Sodam Yat, Sun Boy, Superboy (Kon-El), Superboy Prime, Superman, Thom Kallor, Timber Wolf, Time Trapper, Ultra Boy, White Witch, Wildfire, XS