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

When Superman accidentally returns to Krypton's past, he wrestles with the idea of saving the doomed planet in "The Krypton Syndrome." Then, the Wonder Twins thwart the impending "Invasion of the Space Dolls." Lastly, "Terror on the Titanic" occurs when a huge slime monster raises the legendary ship from the bottom of the sea.