In this TNG story a Klingon officer Tony Todd takes Commander Riker's place as
Executive Officer on the Enterprise as part of a Klingon/Human exchange program. He's as rough as a Klingon could be on the rest of the crew, but he's
going out of his way to test Lieutenant Worf.
The reason becomes clear, Todd is Michael Dorn's long lost brother and the memory of dad is being challenged as dad is being called a traitor in a twenty year old action with the Romulans. As the eldest son Worf has to answer the challenge at the Klingon High Council. As his second Worf chooses Captain Picard.
This is an episode for Michael Dorn to shine and he does. As for the issue of treason, it's decided for the good of the empire that a Liberty Valance type ending is given this episode. But the story would have ramifications for the rest of the run of TNG.
The reason becomes clear, Todd is Michael Dorn's long lost brother and the memory of dad is being challenged as dad is being called a traitor in a twenty year old action with the Romulans. As the eldest son Worf has to answer the challenge at the Klingon High Council. As his second Worf chooses Captain Picard.
This is an episode for Michael Dorn to shine and he does. As for the issue of treason, it's decided for the good of the empire that a Liberty Valance type ending is given this episode. But the story would have ramifications for the rest of the run of TNG.