Dexter's Laboratory
Last But Not Beast
TV Flash files “Last But Not Beast” as a desk essential hour — Dexter's Laboratory (1996–2003) on Cartoon Network, season 2, episode 39, aired 1998-06-15, 30 min.
From the desk
How this hour is filed
This leaf is S02E39: listed hour 52 of 78 in the Dexter's Laboratory guide, last listed hour of season 2. It aired 1998-06-15 (30 min). The listed hour before it is “Dyno-Might/LABretto” (S02E38). Next is “Streaky Clean/A Dad Cartoon/Sole Brother” (S03E01).
Essential hour: “Last But Not Beast”. Last But Not Beast: mid-run title as thesis, the lab door still refusing to stay locked.

Viewer FAQ
Where does Last But Not Beast sit in the Dexter's Laboratory guide?
S02E39 is listed hour 52 of 78 — last listed hour of season 2, season 2 episode 39.
When did Dexter's Laboratory S02E39 air?
Last But Not Beast aired 1998-06-15 and is listed at 30 minutes.
Where did it come from?
Cartoon Network from 1996 after What a Cartoon! shorts — creator-driven shorts as the network's original-hit model.
In the series
Why this series still plays
A boy genius, a secret lab, and a sister who treats every experiment like a dance floor. Genndy Tartakovsky’s early Cartoon Network voice: tiny scientist, huge ego, omnilingual babble, and slapstick that moves like storyboards on espresso. Creator-driven shorts as brand-building — late-nineties CN comedy before the lab door ever stayed locked.
The work, first: a boy genius, a secret lab, a sister who treats every experiment like a dance floor, slapstick that moves like storyboards on espresso. Genndy Tartakovsky's Cartoon Network series arrived in 1996 out of *What a Cartoon!* shorts and became a key early original hit: tiny scientist, huge ego, omnilingual babble. Christine Cavanaugh's Dexter; Allison Moore, later Kathryn Cressida, as Dee Dee. Jeff Bennett as Dad. Creator-driven shorts as brand-building before the lab door ever stayed locked.
Filed against
- Christine Cavanaugh as Dexter
Christine Cavanaugh’s Chuckie Finster made Rugrats a nervous narrator of the backyard jungle — 1990s catalog Nicktoons invention, then Dexter’s Laboratory asking the same throat for a boy genius with a dance-floor sister. TV Flash files…
- Allison Moore as Dee Dee
Allison Moore voiced Dee Dee on Dexter’s Laboratory — the sister who treats every boy-genius experiment like a dance floor and every secret lab like an unlocked door. Genndy Tartakovsky’s Cartoon Network shorts needed that chaos. TV Flash…
- Kathryn Cressida as Dee Dee (later)
Kathryn Cressida voiced Dee Dee later on Dexter's Laboratory — Cartoon Network sister energy as a dance-floor wrecking ball aimed at a boy-genius lab. Genndy Tartakovsky slapstick, omnilingual babble, shorts that moved like espresso…
- Jeff Bennett as Dad
Jeff Bennett voices Dad on Dexter’s Laboratory — boy genius, secret lab, a sister who treats every experiment like a dance floor. Genndy Tartakovsky’s early Cartoon Network voice: tiny scientist, huge ego, slapstick on espresso. TV Flash…
- Kath Soucie as Mom
Kath Soucie made baby twins sound like a whole suburb on Rugrats — Phil and Lil DeVille as pickle-jar mythology — then slipped into Dexter’s Laboratory’s Cartoon Network lab noise. Nicktoons invention with a second register. TV Flash…
Also in season 2
- S02E01 Beard to Be Feared/Quackor the Fowl/Ant Pants
- S02E02 Mom and Jerry/Chubby Cheese/That Crazy Robot
- S02E03 D & DD/Hamhocks and Armlocks
- S02E04 Hunger Strikes/The Koos is Loose/Morning Stretch
- S02E05 Dee Dee Locks and the Ness Monster/Backfire/Book 'Em
- S02E06 Sister's Got a Brand New Bag/Shoo, Shoe Gnomes/Lab of the Lost