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Season 1 (2000–2002)
Happy Tree Friends/Image Gallery/Season 1
Season 2 (2002–2006)
Happy Tree Friends/Image Gallery/Season 2
Season 3 (2007–2013)
Happy Tree Friends/Image Gallery/Season 3
Season 4 (2013–2014)
Happy Tree Friends/Image Gallery/Season 4
Season 5 (2016)
Happy Tree Friends/Image Gallery/Season 5
Season 6 (2026)
Happy Tree Friends/Image Gallery/Season 6
Unnumbered episodes and shorts
"Banjo Frenzy"
Sound Ideas, CARTOON, BOING - STRING PLUCK
"Dino-Sore Days"
"Ski Patrol"
Hollywoodedge, Kick Body Hit 4 Thud Cr PE101601
"YouTube Live Episode"
Sound Ideas, HORROR - BLOOD SPLAT, HUMAN 01
"The Carpal Tunnel of Love"
"Intimate Spotlight"
"False Alarm"
Sound Ideas, ELECTRICITY, SPARK - HIGH VOLTAGE SPARK, ELECTRICAL 02
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters and Sound Ideas, STAB, FLESH - STAB INTO FLESH, BLOOD DRIPPING
"Asbestos I Can Do"
"Under the Skin"
"Milk Pong"
"Lumpy's Lame Card Trick"
"YouTube Copyright School"
Sound Ideas, ELECTRONIC - MAGICAL SWISH 02
Sound Ideas, ELECTRONIC - MAGICAL POOF 01
Sound Ideas, ELECTRONIC - MAGICAL POOF 01
Sound Ideas, ELECTRONIC - MAGICAL POOF 01
_-_YouTube.png "YouTube Copyright School (original) - YouTube.png (148 KB)")
Sound Ideas, INSECT, CRUSH - CRUSH INSECT 03
Sound Ideas, BUZZER, X-RAY - SHORT X-RAY MACHINE BUZZER
Sound Ideas, BUZZER, X-RAY - SHORT X-RAY MACHINE BUZZER
Sound Ideas, BASKETBALL - BASKETBALL, BUZZER, SHORT, DIGIFFECTS
Sound Ideas, ELECTRONIC - MAGICAL POOF 01
Hollywoodedge, Kick Body Hit 4 Thud Cr PE101601
"Oh Xmas Tree"
"Hot Tub Shake"
"On My Mind"
Hollywoodedge, Sword Stabs Shings Fa FS042903
.png "Happy Tree Friends - On My Mind - YouTube (2).png (730 KB)")
Hollywoodedge, Sword Stabs Shings Fa FS042903
.png "Happy Tree Friends - On My Mind - YouTube (1).png (879 KB)")
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
.png "Happy Tree Friends - On My Mind - YouTube (3).png (894 KB)")
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters and Sound Ideas, STAB, FLESH - STAB INTO FLESH, BLOOD DRIPPING
.png "Happy Tree Friends - On My Mind - YouTube (4).png (985 KB)")
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
"Claw"
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
.png "Happy Tree Friends - Claw - YouTube (1).png (1.39 MB)")
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
"Cubtron Z"
"Dumb Ways to Die - Happy Tree Friends Edition"
"YouTube 101: Subscriptions"
"Still Alive - Blood Donor"
"Too Much Scream Time"
"Happy Train Friends"
.png "Dumb Ways to Die x Happy Tree Friends HAPPY TRAIN FRIENDS - YouTube (2).png (900 KB)")
Sound Ideas, STAB, FLESH - STAB INTO FLESH, BLOOD DRIPPING
.png "Dumb Ways to Die x Happy Tree Friends HAPPY TRAIN FRIENDS - YouTube (1).png (374 KB)")
Unknown Sound Effects Library, Flesh Squelches and Blood Splatters
Sound Ideas, HIT, SQUISH - SOLID SQUISH IMPACT and Sound Ideas, STAB, FLESH - STAB INTO FLESH, BLOOD DRIPPING