Ep 8. Rip Van Flintstone

In the Flintstones season 6 episode 8, titled "Rip Van Flintstone," Fred and Barney embark on a hunting trip. After a long day of hunting, Fred becomes exhausted and decides to take a nap. However, when he wakes up, he finds himself transported 20 years into the future. The world has changed dramatically and Fred is now an old man, with grown children and a wife who barely recognizes him.

As he struggles to come to terms with his new reality, Fred must also navigate the new world he's found himself in. He discovers that his old job at the quarry has been replaced by machines, and he struggles to find his place in this new society. At the same time, he realizes that he's missed out on many important milestones in his life, such as seeing his children grow up and experiencing new technologies.

Meanwhile, back in the present day, Barney is frantic with worry over his missing best friend. He and Wilma launch a search party to try and find Fred, but with no luck. As the days go by, Barney starts to lose hope that he'll ever see his friend again.

Eventually, Fred manages to figure out a way to return to his own time. However, he's left deeply shaken by his experience and the thought of what might have been. He realizes that he needs to cherish every moment with his loved ones, and that he can't take anything for granted.

Overall, "Rip Van Flintstone" is a poignant and thought-provoking episode that explores themes of time, regret, and the importance of family and friends. It's a classic Flintstones tale that's sure to resonate with audiences of all ages.