Barbara Goodson reprises her role playing Mother Talzin, her second of 2 famous evil witch characters. The first was Rita Repulsa in Mighty Morphin Power Rangers
The 2020 anthology book "Star Wars The Clone Wars: Stories of Light and Dark" features an original story inspired by "Massacre" that reveals events set after this story. It is written by E. Anne Convery and titled "Bug". The audio-book version is read by Clone Wars voice actor Catherine Taber.
The 'Jedi fortune cookie' message that opens the show reads "One must let go of the past to hold on to the future."