The following events were published by DC Comics in the year 1978. This does not necessarily indicate that these storylines took place in the year 1978. The passage of time in the DC Universe is nebulous and subject to change and interpretation. Events from historical time periods are indexed under their corresponding years.
Deformed scientist Preston Payne meets Matt Hagen and uses an extract of his blood in the hopes of curing his condition. The solution transforms Payne into another Clayface. Note: Takes place several months prior to his first appearance.
Alexander Burgess once again tries to communicate with the imprisoned Dream. Burgess blames Dream for the fact that he has not had a decent night's sleep in over sixty years. As before, Dream remains unresponsive.
The Joker poisons Gotham's rivers with his Joker Venom, creating mutated Joker Fish. He attempts to force the copyright commissioner to trademark the Joker Fish for him, but when the clerk fails to do so, the Joker murders him.
Kobra acquires a dangerous WMD from a naval ship and threatens to destroy the city of Lisbon. Aquaman, Batman and Green Lantern fight his terrorist cult and foil his plan, but Kobra escapes with the weapon.