Collects Excalibur #21-28. What do Crusader X, Lord High Justicer, Centurion Britannus, Chevalier Bretagne and Lady London have in common? They're all Captain Britain! Excalibur's Cross-Time Caper concludes cataclysmically in a climactic coda of cosmic confrontations! Traumatic transformation! Evil illusion! Super-powered rebellions on two worlds and titanic tricksters on two more! With guest appearances you'd never expect!