when do they find out who red coat is
Red Coat (Pretty Little Liars) In the fourth season's mid-season finale "Now You See Me, Now You Don't", the Liars head to Ravenswood to look for Red Coat. While there, Red Coat kidnaps Emily and locks her in a coffin on a Sawmill. The Liars witness Red Coat heading to that Sawmill and chase her inside, where she actually stops the saw and another Red Coat, donning a mask of Alison's face, appears on the stairwell, revealing that two people have been sporting the disguise all along. Spencer follows the "good" one, while Aria fights and unmasks the other figure as CeCe Drake. The Liars manage to catch the "good" Red Coat near the ending of "Grave New World", who reveals herself as an alive Alison. During "EscApe from New York", Ali claims that she asked CeCe to wear the disguise to distract "Big A". It is later revealed this was all a ruse, given that CeCe actually was the Red Coat who stole the game from Mona and wore the disguise during her schemes until she was caught in it. In "Game Over, Charles", the Liars learn there was a third Red Coat who posed as a decoy to CeCe and used the infamous disguise to distract the Liars whenever she couldn't. The third Red Coat is revealed to be Sara Harvey.
The Hunt for Red October As the ship leaves the shipyard at Polyarny, Ramius kills Ivan Putin, his political officer, to ensure that Putin will not interfere with the defection. Before sailing, Ramius had sent a letter to Admiral Yuri Padorin, Natalia's uncle, brazenly stating his intention to defect. The Soviet Northern Fleet therefore sails out to sink Red October under the pretext of a search and rescue mission. Meanwhile, Jack Ryan, a high-level CIA analyst and a former Marine, flies from London to Langley, Virginia, to deliver MI6's photographs of Red October to the Deputy Director of Intelligence. Ryan consults a friend at the U.S. Naval Academy, ex-submariner Skip Tyler, and finds out that Red October's new construction variations house its stealth drive.