The demonic space criminal Kain has escaped from prison and destroyed the Galaxy Police headquarters. To ensure that the Jurai will not stop him, Kain travels back to 1970 to eliminate Tenchi's mother before he is even born. Now, Tenchi and the gang must travel to the past to stop him before he ceases to exist.
| Actor | Role |
|---|---|
 Masami KikuchiTenchi Masaki | Tenchi Masaki |
 Ai OrikasaRyoko | Ryoko |
 Chisa YokoyamaSasami | Sasami |
 Megumi HayashibaraAchika | Achika |
 Ryuuzaburou OotomoKain | Kain |
 Yumi TakadaAyeka | Ayeka |
 Etsuko KozakuraRyo-Ohki | Ryo-Ohki |
 Toshiyuki MorikawaNobuyuki Masaki | Nobuyuki Masaki |
 Yuko MizutaniMihoshi | Mihoshi |
 Yuri AmanoKiyone | Kiyone |
 Takeshi AonoKatsuhito Masaki / Nobuyuki Masaki (old) | Katsuhito Masaki / Nobuyuki Masaki (old) |
 Hochu OtsukaSabato | Sabato |
 Yuko KobayashiWashu (voice) | Washu (voice) |