After successfully returning to Earth on the renovated Stratos 4, the four main characters are visited by the Comet Blasters Chizuru Kubo and Annette Kerry, who bring them a shocking video. Meanwhile, Orbital Station 7 is in serious trouble... This two-episode OVA comes between the first and second seasons.

It's Chief Gooley's worst nightmare come true. The Lovely Angels are back on the job, but this time the 3WA's Central Computer has assigned them two cases at the same time: investigate a space liner explosion in which three hundred people died, but no one`s come forward to claim any insurance money; and find a missing scientist and his family. Could the two cases be connected? Only the Central Computer knows and it's not talking. So it's up the Dirty Pair to get down and dirty and solve the puzzle before time runs out for a grieving grandfather, his family and the universe! (Source: AniDB)

Second Youkai Watch movie.

Short flash animation series of Carole & Tuesday released on the official YouTube and Twitter channels.