Debbie decides she wants to have a baby... now. She interviews all of the male crew members to see who would make the best father for her child. The men, of course, turn it into a childish competition. In the meantime, Stormy almost learns a valuable lesson in race relations... but doesn't, quite.
After a huge explosion destroys Sealab, Stormy and Dr. Quinn are mysteriously transported 15 minutes into the past, which puts them in a position to save Sealab from being destroyed in the first place. But Captain Murphy imprisons them. And so Sealab is destroyed by another huge explosion and the vicious cycle continues.
A bloodthirsty, killer alien has boarded Sealab and trapped the entire crew. His shimmering form is seemingly everywhere, rending flesh from human bones, as the remaining survivors cower on the bridge. Once again, it's up to the brave Dr. Quinn (with a little help from Old Gus and Dolphin Boy) to save the day.
Griffin, a terminally ill orphan from the Final Request Foundation, pays a visit to Sealab and captures Marco's heart. Griffin, however, may not be as sweet as he appears. Captain Murphy, fearing an outbreak of bubonic plague, basically freaks out, while Sparks hatches a plan to sell Griff's organs to an Irishman.
Dr. Quinn (electrocuted through an act of profound stupidity by Stormy) has a series of random and bizarre hallucinations, which bring to mind everything from "The Incredible Mr. Limpet" to "Apocalypse Now."