S02E24: Dear Diary
When Eliza ""accidentally"" reads Debbie's diary she learns that Debbie thinks she's an embarrassment of a sister. Debbie and Eliza have it out and learn the real truth about their relationship.
Previous Episode 
Season 1
Flood Warning
S1E1 / 01 Sep 1998
Dinner With Darwin
S1E2 / 03 Sep 1998
Bad Company
S1E3 / 08 Sep 1998
Gold Fever
S1E4 / 10 Sep 1998
Matadi or Bust
S1E5 / 15 Sep 1998
Temple of Eliza
S1E6 / 17 Sep 1998
Vacant Lot
S1E7 / 22 Sep 1998
Only Child
S1E8 / 01 Oct 1998
Iron Curtain
S1E9 / 06 Oct 1998
Valley Girls
S1E10 / 13 Oct 1998
Naimina Enkiyio
S1E11 / 22 Oct 1998
Blood Sisters
S1E12 / 27 Oct 1998
Eliza-cology
S1E13 / 05 Nov 1998
Flight of the Donnie
S1E14 / 17 Nov 1998
Lost & Foundation
S1E15 / 16 Mar 1999
Nigel Knows Best
S1E16 / 18 Mar 1999
The Great Bangaboo
S1E17 / 23 Mar 1999
Rumble in the Jungle
S1E18 / 25 Mar 1999
The Dragon and the Professor
S1E19 / 30 Mar 1999
Born to Be Wild
S1E20 / 01 Apr 1999
Season 2
Rebel Without a Trunk
S2E1 / 16 Aug 1999
Pal Joey
S2E2 / 17 Aug 1999
Rain Dance
S2E3 / 18 Aug 1999
Darwin Plays the Palace
S2E4 / 19 Aug 1999
Stick Your Neck Out
S2E5 / 23 Aug 1999
No Laughing Matter
S2E6 / 24 Aug 1999
Chimp Off the Old Block
S2E7 / 25 Aug 1999
Koality and Kuantity
S2E8 / 26 Aug 1999
Chew if by Sea
S2E9 / 30 Aug 1999
Clash of the Teutons
S2E10 / 31 Aug 1999
You Ain't Seen Nothin', Yeti
S2E11 / 01 Sep 1999
On the Right Track
S2E12 / 02 Sep 1999
Polar Opposites
S2E13 / 06 Sep 1999
Two's Company
S2E14 / 07 Sep 1999
Show Me the Bunny
S2E15 / 13 Sep 1999
Reef Grief
S2E16 / 14 Sep 1999
Thornberry Island
S2E17 / 15 Sep 1999
Dances With Dingoes
S2E18 / 16 Sep 1999
Tamper-Proof Seal
S2E19 / 19 Oct 1999
You Otter Know
S2E20 / 20 Oct 1999
Have Yourself A Thornberry Little Christmas
S2E21 / 29 Nov 1999
Luck Be an Aye-Aye
S2E22 / 15 Feb 2000
The Kung and I
S2E23 / 16 Feb 2000
Dear Diary
S2E24 / 17 Feb 2000
Black and White and Mom All Over
S2E25 / 21 Feb 2000
A Tiger by the Tail
S2E26 / 22 Feb 2000
Forget Me Not
S2E27 / 24 Feb 2000
Song for Eliza
S2E28 / 25 Feb 2000
Gift of Gab
S2E29 / 26 Feb 2000
Bogged Down
S2E30 / 06 Mar 2000
Monkey See, Monkey Don't
S2E31 / 06 Mar 2000
Where the Gauchos Roam
S2E32 / 13 Mar 2000
A Shaky Foundation
S2E33 / 13 Mar 2000
Cheetahs Never Prosper
S2E34 / 20 Mar 2000
Gobi Yourself
S2E35 / 20 Mar 2000
Every Little Bit Alps
S2E36 / 27 Mar 2000
Pack of Thornberrys
S2E37 / 27 Mar 2000
Season 3
Dragon Me Along
S3E1 / 12 Sep 2000
Time Flies
S3E2 / 19 Sep 2000
Horse Sense
S3E3 / 26 Sep 2000
Tyler Tucker, I Presume
S3E4 / 02 Oct 2000
Critical Masai
S3E5 / 03 Oct 2000
Queen of Denial
S3E6 / 04 Oct 2000
Island Trade
S3E7 / 05 Oct 2000
Birthday Quake
S3E8 / 06 Oct 2000
The Legend of Ha Long Bay
S3E9 / 10 Oct 2000
Spirited Away
S3E10 / 28 Oct 2000
A Family Tradition
S3E11 / 22 Nov 2000
Happy Old Year
S3E12 / 27 Dec 2000
Happy Campers
S3E13 / 30 Dec 2000
All Work and No Play
S3E14 / 12 Jan 2001
New Territory
S3E15 / 12 Jan 2001
Operation Valentine
S3E16 / 14 Feb 2001
Hello, Dolphin!
S3E17 / 19 Feb 2001
April Fool's Day
S3E18 / 01 Apr 2001
Gem of a Mom
S3E19 / 10 May 2001
The Anniversary
S3E20 / 14 May 2001
Season 4
The Origin of Donnie (1)
S4E1 / 18 Aug 2001
The Origin of Donnie (2)
S4E2 / 18 Aug 2001
The Origin of Donnie (3)
S4E3 / 18 Aug 2001
The Origin of Donnie (4)
S4E4 / 18 Aug 2001
The Trouble With Darwin
S4E5 / 31 Oct 2001
Hot Air
S4E6 / 01 Jun 2002
Season 5
The Wild Snob-Berry
S5E1 / 03 Feb 2003
Ice Follies
S5E2 / 04 Feb 2003
Fool's Gold
S5E3 / 05 Feb 2003
Clash and Learn
S5E4 / 06 Feb 2003
Sir Nigel (1)
S5E5 / 30 Mar 2003
Sir Nigel (2)
S5E6 / 30 Mar 2003
Look Who's Squawking
S5E7 / 04 Apr 2003
Eliza Unplugged
S5E8 / 11 Jun 2004
Lacey Chabert
Eliza Thornberry (voice)
Jodi Carlisle
Marianne Thornberry (voice)
Tim Curry
Nigel Thornberry (voice)
Flea
Donnie Thornberry (voice)
Danielle Harris
Debbie Thornberry (voice)
