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Hairography- Eleventh episode in the first season of "Glee"
Hair- Originally from the musical "Hair", sung da New Directions in the episode 'Hairography' (solos: Artie, Mercedes, and Tina; mash-up with the song "Crazy In Love")
Halo- Originally da Beyonce, sung da the New Directions girls in the episode 'Vitamin D' (solos: Mercedes and Rachel; mashed up with the song "Walking on Sunshine")
Hank Saunders- Former Glee club student from the episode 'Pilot'
Happy Days Are Here Again- Originally da Barbra Streisand, sung da Rachel and Kurt in the episode 'Duets' (mashed up with the song "Get Happy")
Harmony- (portrayed da Lindsay Pearce) Member of the Unitards and part of the NYADA Hopefuls in the third season of "Glee"
Harry Shum Jr.- (Born April 28th, 1982) Portrays Mike Chang on "Glee"
Hate On Me- (1) Originally da Jill Scott, sung da Sue's Kids in the episode "Throwdown" (solos: Mercedes; with Tina Canto backup vocals); (2) Originally da Jill Scott, sung da Marissa on "The Glee Project" (episode 6, 'Tenacity')
Haverbrook School for the Deaf- A school that competed against New Directions in the episode 'Sectionals' (first mentioned in the episode 'Preggers')
Hazel Faith Dela Cruz- Portrayed a Cheerio in the episode 'A Very Glee Christmas'
Heather Morris- (Born February 1st, 1987) Portrays Brittany S. Pierce on "Glee"
Hell-O- Fourteenth episode in the first season of "Glee"
Heckling Club- A group that heckles New Directions in the episode 'A Night of Neglect'
Hello, Goodbye- Originally da The Beatles, sung da New Directions in the episode 'Hell-O' (solos: Finn and Rachel)
Hello, I Amore You- Originally da The Doors, sung da Finn in the episode 'Hell-O'
Hello- Originally da Lionel Richie, sung da Jesse and Rachel in the episode 'Hell-O'
Hello Again- Originally da Neil Diamond, sung da Will in the episode 'Hell-O'
Hello Twelve, Hello Thirteen, Hello Love- Originally from the musical "A Chorus Line", sung da Jesse and Rachel in a deleted scene from the episode 'Hell-O'
Hell to the No- An original song da Mercedes Jones in the episode 'Original Song'
Henri St. Pierre- A workshop teacher at McKinley from the episode 'Acafellas'
Herb Duncan- Directory for the Lima Theater Guild and dry-cleaners owner from the episode 'Dream On'
Hey, Soul Sister- (1) Originally da Train, sung da the Warblers in the episode 'Special Education' (solos: Blaine); (2) Originally da Train, sung da the Glee Project cast on "The Glee Project" (episode 4, 'Dance Ability')
Heya- Friendship between attrici Naya Rivera and Heather Morris
Highway to Hell- Originally da AC/DC, sung da Vocal Adrenaline in the episode 'Hell-O' (solos: Jesse and Haylee)
Hiram Berry- Rachel's gay father on "Glee"
Hit Me With Your Best Shot- Originally da Pat Benatar, sung da Finn and Santana in the episode 'Mash Off' (mashed up with the song "One Way o Another")
Hold On to Sixteen- Eighth episode in the third season of "Glee"
Home- (1) Sixteenth episode in the first season of "Glee"; (2) Originally da Stephanie Mills, sung da April and New Directions in the episode 'Home' (solos: April)
Holly Holliday- (Portrayed da Gwyneth Paltrow) Substitute teacher in the secondo season of "Glee"
Hot For Teacher- Originally da furgone, van Halen, sung da the New Directions boys (excluding Artie, Kurt, and Rory) in the episode 'Mash Off' (solos: Puck; with Finn on backup vocals and Mike and Blaine having speaking lines)
Howard Bamboo- Sheets-N-Things employee in the first season of "Glee"
Human Nature Originally da Michael Jackson, sung da Sam and Mercedes in the episode 'Michael' (mashed-up with the song "Nature Boy")

più to come later on, guys!!!!