If you look close enough, when they fight with their Rescue Blasters in the ending fight of the episode, Blue Ranger is using the Thermo Blaster and not the Rescue Blaster, but they don't get these new weapons until the next episode.
Vypra: (About the tomb)I've been here before.
Loki: So, what are ya gonna do, give me a tour? Hey, wait up!
Ryan (Rhett Fisher) returns with this episode. His surrogate father, Diabolico, also returns.