The Emperor has returned, with three terrifying new weapons at his side: the Unstoppable Warriors. The Shane Gang must find a way to defeat them, while facing hordes of Underlords and the fury of the Dai-Fu, before they can bring down the Emperor once and for all.
When Pronto accidentally uses the Emperor's sword blaster, he can suddenly do no wrong. Meanwhile, Lady Dai-Fu manipulates Underlord Holt into trapping the Shane Gang with a new superweapon: the Iron Warrior!
The Emperor sets to work creating Unstoppable Warriors to reclaim the Eastern Caverns. To make things even more difficult, a bounty is placed on Junjie's head, sending the Dai-Fu and hordes of the Emperor's Underlords after the Shane Gang.
- Sam Vincent - Eli Shane, Yarry
- Lee Tockar - Pronto, Holt, Jonny Man, Sleade
- Shannon Chan-Kent - Trixie, Hoshi
- Andrew Francis - Kord
- Vincent Tong - Junjie, Symothy, Yang
- Brian Drummond - The Emperor, Hamengku, Shadow Clan
- Kathleen Barr - Lian/Dai-Fu, Drucilla
- Andrew Duncan - Swick
- Michael Dobson - Morv, Oogleby
- Mark Oliver - Pyritor
- "Slugterra: The Emperor's Revenge" in chronological order is the fifth film in the series and is comprised of "The Fall of the Eastern Champion", "The Lady and the Sword", "The Emperor Strikes Back" and "The Return of the Eastern Champion"; the last four episodes in Season Three.
- Although the episodes have already aired numerous times, the film itself premieres on September 27, 2016.