The Voltron Force are tricked into entering a replica of Castle Doom, where Haggar makes their nightmares become real.
The Voltron Force and Coran deal with space pirates to rescue Amalgamus. Once Amalgamus is saved and repaired, the Voltron Force attack Galaxy Garrison to force out Zarkon, Lotor and Haggar.
Lance and Lotor get sucked into Claw Mountain. They arrive in a parallel universe where Lotor commands Voltron and the Castle of Lions, while the Voltron Force are considered rebels.
The shonga Dominus is back and Allura tries to make a home for him in the Castle. But it becomes obvious Dominus needs to go back to his actual home, the Stealth dimension. Joining forces with Kolak, Haggar and Lotor try to get Dominus back on their side.
Zarkon invokes an ancient Arusian law, which allows him to challenge the best fighter to a battle. Lance and Lotor are selected to fight.
Voltron: The Third Dimension is an American computer-animated television series, done in the same animation style as Beast Wars: Transformers and Reboot. It departed from the original Lion Voltron's animated look, as well as some character changes, such as the physical appearance of Prince Lotor. It served as a sequel to the Lion Voltron series, set three years after the end of that program, and among the tools used to bridge the gap was an official starmap as designed by writer Shannon Muir, and finalized in partnership with World Events Productions. The show was animated by Mike Young Productions. The show won a 1999 Daytime Emmy for Outstanding Sound Editing - Special Class Rick Hinson, Elizabeth Hinson. Legal issues occurred when WEP tried to make a new series. Neil Ross, Michael Bell and B.J. Ward reprised their roles as Keith, Lance and Princess Alura for the series.