The three major series continuities are Tenchi Muyo! Ryo-Ohki, Tenchi TV/Universe, and Tenchi in Tokyo. The first series, TM!R, is the original OVA (Original Video Animation) which introduces the core characters. Tenchi TV/Universe and Tenchi in Tokyo are spin-offs that utilize the same characters, with the addition of Kiyone Makibi, though the back story is quite different from the original OVAs. The first of the spin-offs was Tenchi Muyo! TV (also known as Tenchi Universe), in 1995; it is a twenty-six episode TV series that retells the original series differently.
