Admiral Cain and the Battlestar Pegasus.. very disturbing story arc.
When she and the Pegasus first showed up, we all breathed a sigh of relief.. for a while.
Then the shine started rubbing off. When one of her officers is killed while trying to gang rape a prisoner (Caprica Sharon Cylon) by to Galactica crew members, then summarily sentences them to be executed with no trial.
President Roslin sees where Cain is headed, and tells Adama that he needs to kill her.
Then they learn even more, how Cain’s single-mindedness resulted in thousands of civilians dead, families slaughtered, stranded. And then she starts plotting to assassinated Commander Adama.
Yes, they are at war, but there are rules of war. And she broke them, and encouraged her subordinates to do the same thing.
The outcome was inevitable.