When Halftail asks 'if they will take over the abbey and capture them all' this is a referance to Cluny the scourge's final attempt in episode 13.
Vitch: (to Threeclaws) Mind your bussiness fatty.
[Often repeated throuout the episode]
Slagar: [laughs evily] Revenge! [eyes glisten]
Slagar the Cruel is introduced.