Chapter 16: The Rescue - S2-E8
Plot hole: In the previous episode, Mando and the others got a hold of the coordinates of Moff Gideon's cruiser, but this episode begins with them capturing Dr. Pershing in a shuttle, and after that they locate Bo-Katan and Koska and get them on board for the mission. How they found these people is unknown, and cruisers are not planets, they tend not to be stationary. Hard to imagine Mando and the others get into weird and complex subquests to get some help while Gideon at one point, which could be in just moments, could hyperspace in some other sector and leave them with no clue where to find him.
Answer: In (non-canon) Legends, Thrawn was the central character of a trilogy of novels by Timothy Zahn. He was a Chiss officer in the Imperial Navy, who rose to the rank of grand admiral despite being non-human. Thrawn was brought into canon in the Star Wars Rebels series, where he commanded the Empire's Seventh Fleet and led the occupation of Lothal, which was opposed by the series' protagonists including Ahsoka Tano. In the final episode of Rebels, the Jedi and Rebel Ezra Bridger commands Purrgil space whales to drag Thrawn's Star Destroyer into hyperspace, jumping to an unknown location with himself and Thrawn on board. The final scene of the series shows Ahsoka Tano and Sabine Wren leaving Lothal to search for Bridger, and presumably Thrawn.
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