Astronomers discover a comet that they believe will crash into Phoenix, Arizona. They attempt to warn officials, but without 100% certainty, the governor of Arizona is reticent to cause a panic. Even after a television news reporter discovers the truth and threatens to go live with it, the response is understated enough to doom some residents of Phoenix to certain death.

It's the biggest event of the year — the Super Bowl! But the star players for the Cougars, gathered in New Orleans for the big game, are preoccupied with some serious off-the-field issues. Dave Walecki's marriage to his wife Nancy is falling apart, while Jim McCauley is involved in a shady deal with a management firm that could destroy his career. But that's nothing compared to the real drama. There's an assassin killing off many of the team's personnel (as well as their chances of winning)!

The real-life story of Charles Whitman's deadly shooting spree at the University of Texas is retold. In August 1966, after killing his wife and mother, Whitman climbed to the top of the school's tower and opened fire on passers-by, killing 13 and wounding many others.

To obtain a supply of a rare mineral, a ship raising operation is conducted for the only known source, the Titanic.

A man with a grudge against the late Little Joe seeks revenge on the Cartwrights and attempts to take over the Ponderosa.

Flight 23 has crashed in the Bermuda Triangle after a hijacking gone wrong. Now the surviving passengers must brave panic, slow leaks, oxygen depletion, and more while attempting a daring plan, all while 200 feet underwater.