S7·E3 The Krypton Syndrome / Invasion of the Space Dolls / Terror on the Titanic

The Krypton Syndrome: Superman travels through a time warp and is taken back to the hours leading up to Krypton's explosion. He saves the planet by stopping the solar flares using the Super-Mobile core and then returns to the present to find Earth a very different place. Robin confronts him and has no idea who Superman is and then remarks that the Justice League was defeated by the Legion of Doom, he is the only one alive. He soon realizes that by saving Krypton that it erased his time on Earth and that nobody had ever heard of Superman before. Invasion of the Space Dolls: Space dolls try to take over the world but run out of batteries.

Terror on the Titanic: Two divers find the Titanic which has become inhabited by a mutated form of Algae. Aquaman and Black Vulcan respond to the danger. After a lightning blast from Black Vulcan, the Titanic comes alive, and begins to destroy everything in its path. Ultimately the ship sinks back into the ocean after slamming into a jagged iceberg.