THE SIMPSONS: Lisa’s imaginary best friend, Rachel (Guest Voice Sarah Silverman), is jealous of Lisa’s real best friends and starts killing them in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT). THE SIMPSONS ™ and © 2016 TCFFC ALL RIGHTS RESERVED. CR:FOX

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT).

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT). Pictured: Guest Voice Drew Carey. THE SIMPSONS ™ and © 2016 TCFFC ALL RIGHTS RESERVED. CR:FOX

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT). Pictured: Guest Voice Judith Owen. THE SIMPSONS ™ and © 2016 TCFFC ALL RIGHTS RESERVED. CR:FOX

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT).

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT).

THE SIMPSONS: In the midst of a major drought, Mr. Burns introduces a Hunger Games-style contest in which Springfield’s children fight each other for a day in Burns’ personal reservoir. Meanwhile, Lisa’s imaginary best friend, Rachel, is jealous of Lisa’s real best friends and starts killing them. Moe tells Bart that the barflies are actually covert agents and that he wants Bart join their team in Homer’s place in the all-new “Treehouse of Horror XXVII” episode airing Sunday, Oct. 16, (8:00-8:31 PM ET/PT).