So I hear there has been some confusion about the correct order of the several Tenchi series. So allow me to explain.
The first series created was the original 3 Tenchi Muyo! OVAs. It is also known as Tenchi Muyo! Ryo-Ohki. It has 20 episodes and has been aired on Toonami several times. In this OVA, Tenchi has special powers, unlike the segundo series.
-The first OVA is episodes 1-6. -Tenchi Muyo! Daughter of Darkness* -Episode 7 is a special. -Episodes 8-13 are OVA 2. (Including the bonus episode 13.5) -Episodes 14-19 are OVA 3. -Episode 20 is a special.