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Dalton Academy- an all boys private school that the Warblers attend
Dalton Academy Warblers- A 글리 club at Dalton Academy; consists of Blaine (former member), Kurt (former member), and Sebastian 
Dalton Academy Warblers Council- Group of three upperclassmen voted to lead the Warblers
Dalton Rumba- (portrayed 의해 Michael Hitchcock) Show choir director at Haverbrook School for the Deaf
Dance Ability- Fourth episode in the first season of "The 글리 Project"; focuses on contestants' dancing
Damian McGinty- (born September 9th, 1992) Contestant from "The 글리 Project"; won 7 episode-arcs and portrays Rory Flanagan on "Glee"
Dammit, Janet- Originally from the musical "Rocky Horror Picture Show", sung 의해 Finn and Rachel (back-up 의해 Mercedes, Kurt, and Quinn) in the episode 'Rocky Horror 글리 Show' (solos: Finn and Rachel)
Dancing Queen- Originally 의해 ABBA, sung 의해 Mercedes and Santana in the episode 'Prom Queen'
Dancing With Myself- Originally 의해 Billy Idol and Generation X, sung 의해 Artie in the episode 'Wheels'
Darren- An 에메랄드 Dreams lawncare worker who was in a short relationship with Finn's mother in the first season of "Glee"
Darren Criss- (born February 5th, 1987) Portrays Blaine Anderson on "Glee"
Dakota Stanley- (portrayed 의해 Whit Hertford) Vocal Adrenaline's choreographer
David Karofsky- (portrayed 의해 Max Alder) Former WMHS Titans football player and William McKinley student on "Glee" 
David Thompson- (portrayed 의해 Titus Makin Jr.) A student at Dalton Academy and a member of the Warblers
Daydream Believer- Originally 의해 The Monkees, sung 의해 a former 글리 club in the episode 'Dream On' (solos: Bryan Ryan)
Debra Monk- (born February 27th, 1949) Portrayed Mrs. Schuester in the episode 'Acafellas'
Deck the Rooftop- Sung 의해 New Directions in the first 글리 크리스마스 album (solos: Mercedes, Brittany, Finn, Artie, Rachel, Santana, and Tina)
Defying Gravity- (1)Originally from the musical "Wicked", sung 의해 Kurt and Rachel in the episode 'Wheels'; (2) Originally from the musical "Wicked", sung 의해 Lindsay Pearce on "The 글리 Project" (episode 9, 'Generosity')
Dennis Halberstadt- (portrayed 의해 John Ross Bowie) School photographer in the episode 'Mattress'
Department Store Santa- A minor character from 'A Very 글리 Christmas' 
Dianna Agron- (born April 30th, 1986) Portrays Quinn Fabray on "Glee"
Dijon Talton- (born September 17th, 1989) Portrayed Matt Rutherford in season 1 of "Glee"
Ding Dong! The Witch Is Dead- Originally from the musical "The Wizard of Oz", sung 의해 Kurt and Rachel in the episode 'The Purple 피아노 Project'
Diva-Off- A face-off between two singers for different reasons
Dodgeball- A 인기 sport in gym classes; first seen in the episode 'Mash Off'
Dog 일 Are Over- Originally 의해 Florence and the Machine, sung 의해 New Directions in the episode 'Special Education' (solos: Tina and Mercedes)
Dominic Barnes- An American singer and actor; portrayed Trent Nixon on "Glee" 
Don't Cry For Me, Argentina- Originally from the musical "Evita", sung 의해 Kurt (one version) and Rachel (one version) in the episode 'Special Education'
Don't Go Breaking My Heart- Originally 의해 Elton John and Kiki Dee, sung 의해 Finn and Rachel in the episode 'Duets'
Don't Make Me Over- Originally 의해 Dionne Warwick, sung 의해 Mercedes on Glee: The Music, Volume 2, and played in the bedroom scene with Rachel and Kurt and the hallway scene with Rachel and Finn in the episode 'Hairography' 
Don't Rain On My Parade- Originally from the musical "Funny Girl", sung 의해 Rachel in the episode 'Sectionals'
Don't Stand So Close to Me- Originally 의해 The Police, sung 의해 Will in the episode 'Ballad' (mashed up with the song "Young Girl")
Don't Stop- Originally 의해 Fleetwood Mac, sung 의해 New Directions in the episode 'Rumours' (solos: Sam, Quinn, Finn, and Rachel)
Don't Stop Believin'- (1) Originally 의해 Journey, sung 의해 New Directions in the episodes 'Pilot', 'The Rhodes Not Taken', and 'Journey to Regionals' (solos: Finn, Rachel, Puck (Journey Medley), Santana (Journey Medley), Kurt (from Pilot), Mercedes (from Pilot), Artie (from Pilot), and Quinn (from The Rhodes Not Taken); (2) Originally 의해 Journey, sung 의해 The 글리 Project cast on "The 글리 Project" (episode 10, 'Glee-ality') 
Don't 당신 Want Me- (1) Originally 의해 Human League, sung 의해 Blaine and Rachel in the episode 'Blame It On the Alcohol'; (2) Originally 의해 Human League, sung 의해 Marissa and Samuel on "The 글리 Project" (episode 5 'Pairability')
Dr. Chin- (portrayed 의해 Amy Hill) Quinn's obstetrician in the episode 'Throwdown'
Dr. Shane- (portrayed 의해 Kathleen Quinlan) Emma's therapist from the episode 'Born This Way'
Dr. Wu- (portrayed 의해 Kenneth Choi) Kendra and Terri's obstetrician in season 1 of "Glee"
Dreams- Originally 의해 Fleetwood Mac, sung 의해 April and Will in the episode 'Rumours'
Dream A Little Dream- Originally 의해 Ozzie Nelson, sung 의해 New Directions in the episode 'Dream On' (solos: Artie) 
Dream On- (1) Ninteenth episode from the first season of "Glee"; (2) Originally 의해 Aerosmith, sung 의해 Will and Bryan in the episode 'Dream On'
Duets- Fourth episode from the 초 season of "Glee"
Dustin Goolsby- (portrayed 의해 Cheyenne Jackson) Former coach of Vocal Adrenaline
Dwight Evans- (portrayed 의해 John Schneider) Sam's father; first appeared in the episode 'Hold On to Sixteen'
There's 더 많이 to come later. :)
Dalton Academy- an all boys private school that the Warblers attend
Dalton Academy Warblers- A 글리 club at Dalton Academy; consists of Blaine (former member), Kurt (former member), and Sebastian
Damian McGinty (portrays Rory Flanagan on "Glee")
Dalton Academy Warblers Council- Group of three upperclassmen voted to lead the Warblers
Dalton Rumba- (portrayed 의해 Michael Hitchcock) Show choir director at Haverbrook School for the Deaf
Dance Ability- Fourth episode in the first season of "The 글리 Project"; focuses on contestants' dancing
Damian McGinty- (born September 9th, 1992) Contestant from "The 글리 Project"; won 7 episode-arcs and portrays Rory Flanagan on "Glee"
Dammit, Janet- Originally from the musical "Rocky Horror Picture Show", sung 의해 Finn and Rachel (back-up 의해 Mercedes, Kurt, and Quinn) in the episode 'Rocky Horror 글리 Show' (solos: Finn and Rachel)
Dancing Queen- Originally 의해 ABBA, sung 의해 Mercedes and Santana in the episode 'Prom Queen'
Dancing With Myself- Originally 의해 Billy Idol and Generation X, sung 의해 Artie in the episode 'Wheels'
Darren- An 에메랄드 Dreams lawncare worker who was in a short relationship with Finn's mother in the first season of "Glee"
Darren Criss- (born February 5th, 1987) Portrays Blaine Anderson on "Glee"
Dakota Stanley- (portrayed 의해 Whit Hertford) Vocal Adrenaline's choreographer
David Karofsky- (portrayed 의해 Max Alder) Former WMHS Titans football player and William McKinley student on "Glee"
Dianna Agron (portrays Quinn Fabray on "Glee")
David Thompson- (portrayed 의해 Titus Makin Jr.) A student at Dalton Academy and a member of the Warblers
Daydream Believer- Originally 의해 The Monkees, sung 의해 a former 글리 club in the episode 'Dream On' (solos: Bryan Ryan)
Debra Monk- (born February 27th, 1949) Portrayed Mrs. Schuester in the episode 'Acafellas'
Deck the Rooftop- Sung 의해 New Directions in the first 글리 크리스마스 album (solos: Mercedes, Brittany, Finn, Artie, Rachel, Santana, and Tina)
Defying Gravity- (1)Originally from the musical "Wicked", sung 의해 Kurt and Rachel in the episode 'Wheels'; (2) Originally from the musical "Wicked", sung 의해 Lindsay Pearce on "The 글리 Project" (episode 9, 'Generosity')
Dennis Halberstadt- (portrayed 의해 John Ross Bowie) School photographer in the episode 'Mattress'
Department Store Santa- A minor character from 'A Very 글리 Christmas'
"Ding Dong! The Witch Is Dead" 의해 Kurt and Rachel
Dianna Agron- (born April 30th, 1986) Portrays Quinn Fabray on "Glee"
Dijon Talton- (born September 17th, 1989) Portrayed Matt Rutherford in season 1 of "Glee"
Ding Dong! The Witch Is Dead- Originally from the musical "The Wizard of Oz", sung 의해 Kurt and Rachel in the episode 'The Purple 피아노 Project'
Diva-Off- A face-off between two singers for different reasons
Dodgeball- A 인기 sport in gym classes; first seen in the episode 'Mash Off'
Dog 일 Are Over- Originally 의해 Florence and the Machine, sung 의해 New Directions in the episode 'Special Education' (solos: Tina and Mercedes)
Dominic Barnes- An American singer and actor; portrayed Trent Nixon on "Glee"
Dodgeball scene from "Mash Off"
Don't Cry For Me, Argentina- Originally from the musical "Evita", sung 의해 Kurt (one version) and Rachel (one version) in the episode 'Special Education'
Don't Go Breaking My Heart- Originally 의해 Elton John and Kiki Dee, sung 의해 Finn and Rachel in the episode 'Duets'
Don't Make Me Over- Originally 의해 Dionne Warwick, sung 의해 Mercedes on Glee: The Music, Volume 2, and played in the bedroom scene with Rachel and Kurt and the hallway scene with Rachel and Finn in the episode 'Hairography'
"Don't Stop Believin'" sung 의해 New Directions (Pilot)
Don't Rain On My Parade- Originally from the musical "Funny Girl", sung 의해 Rachel in the episode 'Sectionals'
Don't Stand So Close to Me- Originally 의해 The Police, sung 의해 Will in the episode 'Ballad' (mashed up with the song "Young Girl")
Don't Stop- Originally 의해 Fleetwood Mac, sung 의해 New Directions in the episode 'Rumours' (solos: Sam, Quinn, Finn, and Rachel)
Don't Stop Believin'- (1) Originally 의해 Journey, sung 의해 New Directions in the episodes 'Pilot', 'The Rhodes Not Taken', and 'Journey to Regionals' (solos: Finn, Rachel, Puck (Journey Medley), Santana (Journey Medley), Kurt (from Pilot), Mercedes (from Pilot), Artie (from Pilot), and Quinn (from The Rhodes Not Taken); (2) Originally 의해 Journey, sung 의해 The 글리 Project cast on "The 글리 Project" (episode 10, 'Glee-ality')
"Don't 당신 Want Me" 의해 Samuel and Marissa (from "The 글리 Project")
Don't 당신 Want Me- (1) Originally 의해 Human League, sung 의해 Blaine and Rachel in the episode 'Blame It On the Alcohol'; (2) Originally 의해 Human League, sung 의해 Marissa and Samuel on "The 글리 Project" (episode 5 'Pairability')
Dr. Chin- (portrayed 의해 Amy Hill) Quinn's obstetrician in the episode 'Throwdown'
Dr. Shane- (portrayed 의해 Kathleen Quinlan) Emma's therapist from the episode 'Born This Way'
Dr. Wu- (portrayed 의해 Kenneth Choi) Kendra and Terri's obstetrician in season 1 of "Glee"
Dreams- Originally 의해 Fleetwood Mac, sung 의해 April and Will in the episode 'Rumours'
Dream A Little Dream- Originally 의해 Ozzie Nelson, sung 의해 New Directions in the episode 'Dream On' (solos: Artie)
Mercedes and Santana from "Duets"
Dream On- (1) Ninteenth episode from the first season of "Glee"; (2) Originally 의해 Aerosmith, sung 의해 Will and Bryan in the episode 'Dream On'
Duets- Fourth episode from the 초 season of "Glee"
Dustin Goolsby- (portrayed 의해 Cheyenne Jackson) Former coach of Vocal Adrenaline
Dwight Evans- (portrayed 의해 John Schneider) Sam's father; first appeared in the episode 'Hold On to Sixteen'
There's 더 많이 to come later. :)
