Great Scott! This three-part, loose Back to the Future parody includes some taboo swapping—here, it's sisters, moms and daughters. Computer nerds Jimmy Michaels and Carlos Dickinson in 2019 invent a time machine and journey to 1985. Oops—they go to 1995 instead, and end up screwing two lesbian-inclined sisters (Chloe Temple and Venus Vixen) ... who will later turn out to be their stepmoms. What are the odds!

Wham, bang, time travel paradox be damned. They abruptly return to present, and their stepmoms (now older and played by Kiki Klout and Sasha Pearl) recognize the boys' clothes, put two and two together, and realize what must have happened. The clincher is when they make them show their dicks—yep, it's them! A foursome happens 18 years after their first get-together, and facial pops certify their blast from the past—in the present.

Everything comes full circle, if that is possible in a wacky time travel plot, with Temple and Vixen confronting their stepdads (Tony Rubino and Sergeant Miles), who gamely try to fill them in on the real details of their family tree. Bad enough that the stepbrothers' brief foray into 1995 caused the girls to both get pregnant—now they want revenge on their stepmoms. Without a program to keep track of everything, it is almost explained when one of the girls said, “They fucked our mothers, so we should fuck their ex husbands.” Which is an ideal, if confusing, lead-in/excuse for this foursome to, well, become a foursome. For revenge. The guys, supposedly their stepdads since their real dads were actually their stepbrothers, naturally go along with it. Or something along those lines.

This has a lot of light comedic stuff going on—mostly thanks to the plot and characterization.