Plot hole: During a private conversation with Worf, (the not yet revealed to be clone of) Kahless recounts a time during Worf's childhood when the actual Kahless appeared to Worf in a vision and told him he would do something no other Klingon had ever done. However, it would be impossible for a clone to have such a memory, as his creators would have no knowledge that such a memory even existed, let alone the circumstances and specific content of that vision.
Suggested correction: The implication is that Koroth or one of the other priests knew of Worf's vision. Given the purpose of the temple, and the fact Worf had discussions with Koroth prior to the clone appearing, it is obvious that Worf told either Koroth or one of the other priests the specifics of his vision and that his purpose for being there was he wished to see Kahless again.
Continuity mistake: In the opening scene, Riker's rank pips are diagonal on his collar. Then in Worf's quarters, the pips are level as they should be.
