<P> In the third season, we see Red Coat purchasing hoodies for the team she is building, and later the Liars begin catching glimpses of her . Hanna sees the mysterious figure watching her outside a boutique, Emily remembers her in a flashback to the night she and Mona kidnapped her, Spencer notices her on a date with Wren and Aria catches her at a morgue . All four girls see two specific details in regards to her physical features: a red trench coat with blonde curly hair hanging out . Emily suspects that Red Coat is the one in charge of the "A-Team" and they hatch a plan to catch her . Spencer having joined the "A-Team" at the time to look for clues on Toby, who was briefly on the team before inexplicably disappearing, finds out that he is alive and a double agent who intends to help the girls . Spencer gives Mona and Red Coat the idea to throw a party at the Thornhill Lodge, where Red Coat can meet the girls in person . Mona and Red Coat agree with the idea . Red Coat flies in on a plane and Toby and Spencer go outside to catch her . As the other Liars corner Mona inside, someone sets fire to the lodge . Toby goes to follow a flashlight in the woods and Spencer follows Red Coat, who gets off the plane and heads into the woods . Aria, Emily, Hanna and Mona fall unconscious due to the flames and smoke, but Hanna is pulled out by Red Coat and she looks up to see Alison DiLaurentis . As the girls all gather outside, Mona says she also saw Alison and Spencer believes she did too . However, Mona proceeds to admit that she doesn't know the accurate identity of Red Coat because the anonymous entity always wore a mask . </P> <P> In the fourth season, Red Coat continues to play the game . The disguise is briefly abandoned, after the Red Coat who flew into the Lodge burned her coat and mask in the Lodge fire, but Red Coat returns mid-season and films a video of herself in an Emily mask . She then begins sneaking under the DiLaurentis home and surveilling the residence . Toby and Caleb begin looking for clues on her identity and discover that CeCe Drake is the one who set up the flight plan for Red Coat to go to the Lodge . The Liars hunt for CeCe but with no luck . In "Bring Down the Hoe," she returns and is seen in a room filled with photos of Alison and a red coat laying on a chair . Red Coat shows up to the Rosewood High Hoedown and Spencer and Emily manage to take her coat . They discover that the coat is missing the same button which they found earlier underneath the DiLaurentis house . Meanwhile, CeCe lurks outside Ezra's apparent in the same attire that Red Coat wears but now in a black hoodie . </P> <P> 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 . </P> <P> Big "A" kidnaps Alison from the Rosewood High senior prom and takes her to Radley, where their dad and brother are also there, unconscious . With Mona's aid, the Liars figure out that "A's" phone server is located at the Carissimi Group's building and along with Sara make their way over there . They manage to break into a secret room hidden in the wall of an empty storage room . The Liars and Mona go inside but Sara suspiciously leaves them behind, just as the door closes . </P>

When do they find out who red coat is