S04E07: Changing Nature
Efforts to solve an environmental crisis put the dinosaurs on the road to doomsday.
Previous Episode 
Season 1
The Mighty Megalosaurus
S1E1 / 26 Apr 1991
The Mating Dance
S1E2 / 03 May 1991
Hurling Day
S1E3 / 10 May 1991
High Noon
S1E4 / 17 May 1991
The Howling
S1E5 / 24 May 1991
Season 2
The Golden Child
S2E1 / 18 Sep 1991
Family Challenge
S2E2 / 25 Sep 1991
I Never Ate for My Father
S2E3 / 02 Oct 1991
Charlene's Tale
S2E4 / 09 Oct 1991
Endangered Species
S2E5 / 16 Oct 1991
Employee of the Month
S2E6 / 23 Oct 1991
When Food Goes Bad
S2E7 / 30 Oct 1991
Career Opportunities
S2E8 / 06 Nov 1991
Unmarried ... With Children
S2E9 / 13 Nov 1991
How to Pick Up Girls
S2E10 / 20 Nov 1991
Switched At Birth
S2E11 / 27 Nov 1991
Refrigerator Day
S2E12 / 11 Dec 1991
What Sexual Harris Meant
S2E13 / 18 Dec 1991
Fran Live
S2E14 / 08 Jan 1992
Power Erupts
S2E15 / 15 Jan 1992
The Clip Show
S2E16 / 22 Jan 1992
A New Leaf
S2E17 / 05 Feb 1992
The Last Temptation of Ethyl
S2E18 / 12 Feb 1992
Nuts To War (1)
S2E19 / 19 Feb 1992
Nuts To War (2)
S2E20 / 26 Feb 1992
And The Winner Is...
S2E21 / 25 Mar 1992
Slave to Fashion
S2E22 / 01 Apr 1992
Leader of the Pack
S2E23 / 22 Apr 1992
WESAYSO Knows Best
S2E24 / 08 May 1992
Season 3
Nature Calls
S3E1 / 18 Sep 1992
Baby Talk
S3E2 / 02 Oct 1992
Network Genius
S3E3 / 16 Oct 1992
The Discovery
S3E4 / 23 Oct 1992
Little Boy Boo
S3E5 / 30 Oct 1992
Germ Warfare
S3E6 / 06 Nov 1992
Hungry for Love
S3E7 / 13 Nov 1992
License to Parent
S3E8 / 20 Nov 1992
Charlene's Flat World
S3E9 / 04 Dec 1992
Wilderness Weekend
S3E10 / 18 Dec 1992
The Son Also Rises
S3E11 / 08 Jan 1993
Getting to Know You
S3E12 / 15 Jan 1993
Green Card
S3E13 / 29 Jan 1993
Out of the Frying Pan
S3E14 / 05 Feb 1993
Steroids to Heaven
S3E15 / 12 Feb 1993
Honey, I Miss the Kids
S3E16 / 19 Feb 1993
Swamp Music
S3E17 / 26 Feb 1993
Dirty Dancin'
S3E18 / 12 Mar 1993
If I Were a Tree
S3E19 / 16 Apr 1993
We Are Not Alone
S3E20 / 02 May 1993
Charlene and Her Amazing Humans
S3E21 / 09 May 1993
The Clip Show II
S3E22 / 02 Jul 1993
Season 4
Monster Under the Bed
S4E1 / 01 Jun 1994
Earl, Don't Be a Hero
S4E2 / 08 Jun 1994
The Greatest Story Ever Sold
S4E3 / 22 Jun 1994
Driving Miss Ethyl
S4E4 / 29 Jun 1994
Earl's Big Jackpot
S4E5 / 06 Jul 1994
Terrible Twos
S4E6 / 13 Jul 1994
Changing Nature
S4E7 / 20 Jul 1994
Georgie Must Die
S4E8 / 06 Sep 1995
Into the Woods
S4E9 / 20 Sep 1995
Variations on a Theme Park
S4E10 / 06 Nov 1995
Life in the Faust Lane
S4E11 / 07 Nov 1995
Working Girl
S4E12 / 08 Nov 1995
Earl and Pearl
S4E13 / 09 Nov 1995
Scent of a Reptile
S4E14 / 10 Nov 1995
Stuart Pankin
Earl Sinclair (voice)
Jessica Walter
Fran Sinclair (voice)
Sally Struthers
Charlene Sinclair (voice)
