Watch Thundercats 2011 S01e05 -

: Their friendship fractured during a mission to find the Book of Omens, where Grune's greed and ambition led him to side with Mumm-Ra.

: The central moral conflict of the episode, contrasting Panthro's duty with Grune's selfishness. Watch ThunderCats 2011 S01E05

: Flashbacks show Panthro and Grune as close brothers-in-arms serving King Claudis. : Their friendship fractured during a mission to