I realized that I didn't remember details of this episode, because I didn't (or couldn't) view it attentively. Okay, I read the scenario and summarized the 1st half of the episode.
# 1 (Tribunal in Seoul) : Yun Du-Su accusing YSS as a traitor.
# 2 (the HQ on Hansan Island) : Won Kyun calling YSS as traitor and ordering to demote the commoners and the slaves who became navy officers after having passed the Military Examination under YSS's presidency. Sub-commanders' objection. Won Kyun fires them.
# 3 (Tribunal in Seoul) : Torture scene
# 4 (King's room in the Royal Palace, Seoul) : Prince Gwang-hae tells King Sunjo that YSS is innocent. Sunjo warns the prince that suspicion can fall on his loyalty if he opposes the king's will.
# 5 (a room in the Royal Palace) : The prince meets Yu Sung-Ryong, the Prime Minister. The prince asks him to persuade the king, but Minister Yu leaves the room without responding.
# 6 (outside of the Palace) : Yu Sung-Ryong with gloomy face.
# 7 (Tribunal) : nocturnal torture scene - YSS says to Yun Dun-Su that the people of Chosun are not the enemy.
# 8 (The navy's HQ on Hansan Island) : (a building shot)
# 9 (Hansan Island) : Admiral Yi Ok-Ki meets Won Kyun and tries to dissuade him from firing YSS's sub-commanders. Won Kyun says that, for military officers, loyalty is more important than competence and that he doesn't want to keep in his camp those disloyal subjects who are defending the traitor (=YSS). Admiral Won also says that Yi Ok-Ki should not be involved in this matter because he is the most trusted commander by the king as he is a relative of the royal family (Yi clan of Jeonju). Admiral Yi answers he would not object under a condition.
Admiral Yi Ok-Ki (in Episode 76 or 77?)
# 10 (Hansan Island) : Navy commanders, fired by Won Kyun, are in civilian costume. Only Kim Wan and Yi Young-Nam are waring military uniform. They argue that they must fight against Won Kyun. Kwon Jun says that the whole army of Chosun would be sent to Hansan Island if the navy commanders take arms and it's an eventual situation about which YSS worried because it will give a good opportunity to the Japanese to annihilate the whole Chosun army and navy. So Kim Wan says he will also leave the navy with them. Yi Young-Nam agrees. But Kwon Jun says that he and Admiral Yi Ok-Ki asked Won Kyun not to fire Kim Wan and Young-Nam (it was the "condition" that Yi Ok-ki demanded to Won Kyun) and that at least they should stay in the navy in order that the navy wouldn't collapse.
Those who are fired by Won Kyun (from left to right : Hwang Se-Deuk, Kwon Jun, Yi Uhn-Ryang (behind), Yi Sun-Shin the homonym, Song Hui-Rip, Na Dae-Young.
# 11 (ship building department on Hansan Island) : Jo Su-Chang (Yi Ji-Soon in AOW) is repairing oars. He is in soldier's uniform. Lt. Na comes to Su-Chang and says he is always a ship building commander regardless of his uniform. (This emotive scene will be shown again with flash back in Ep. 92).
Jo Su-Chang and Na Dae-Yong
# 12 (Hansan Island) : Kwon Jun and other fired officers take their leave to Won Kyun.
# 13 (a port of Hansan Island) : Soldiers standing before a warship. Ma Young-Gap, in soldier's uniform, says he will accompany Kwon Jun and others for sailing to land.
Ma Young-Gap
# 14 (below decks) : Young-Gap beats drum among oarsmen.
# 15 (on the deck) : Kwon Jun and other ex-commanders on the deck. Yi Sun-Shin (the homonym) asks if they would be able to return to the navy. Nobody answer.
# 16 (Hansan Island) : Commander Bae Seol arriving at the HQ. He is a successor of Kwon Jun in the Right Kyungsang Navy.
Admiral Bae Seol
# 17 (Hansan Island) : Commander Bae meets Won Kyun.
# 18 (the HQ of the Chosun army) : Marshal Kwon Yul is discontent with the fact that Won Kyun fired almost all of YSS's sub-commanders. Commander Kim Eung-Suh (the Right Kyungsang Army) says that the marshal should keep in mind the advice (and the warning) of his son-in-law who is the Minister of War. (Cf. In the previous episode, King Sunjo sent Yi Hang-Bok, the Minister of War, to Kwon Yul and warned him not to be messed with YSS's matter.)
Marshal Kwon Yul
# 19 (on the sea off Busan) : Several hundred Japanese vessels sailing to Chosun.
# 20 (the Japanese HQ in Busan) : (a building shot)
# 21 (Busan) : The Japanese are happy with the fact that YSS is arrested and tortured.
# 22 (Seoul) : torture scene
# 23 (Seoul) : YSS in prison
There are 42 scenes in total. I don't know the running time up to Scene # 23 because I only read the scenario. I hope this summary would be helpful.
But i understand if your busy. It certainly was kind of you to add a mini summary for me. thanks again. BTW you know choko's visual review has no info on episode 90 right? 
