S01E20: The Fifth Wheel
Alex gets stuck babysitting for his little sister Jennifer, who is fed up with feeling in the way at his poker game and decides to disappear.
Previous Episode 
Season 1
Pilot
S1E1 / 22 Sep 1982
Not With My Sister You Don't
S1E2 / 29 Sep 1982
I Know Jennifer's Boyfriend
S1E3 / 06 Oct 1982
Summer of '82
S1E4 / 27 Oct 1982
I Never Killed for My Father
S1E5 / 03 Nov 1982
Give Your Uncle A Kiss
S1E6 / 10 Nov 1982
Big Brother Is Watching
S1E7 / 17 Nov 1982
No Nukes Is Good Nukes
S1E8 / 24 Nov 1982
Death Of A Grocer
S1E9 / 01 Dec 1982
Have Gun, Will Unravel
S1E10 / 08 Dec 1982
A Christmas Story
S1E11 / 15 Dec 1982
Oops
S1E12 / 22 Dec 1982
Sherry Baby
S1E13 / 12 Jan 1983
The Fugitive (1)
S1E14 / 19 Jan 1983
The Fugitive (2)
S1E15 / 26 Jan 1983
Margin Of Error
S1E16 / 09 Feb 1983
French Lessons
S1E17 / 15 Feb 1983
I Gotta Be Ming
S1E18 / 22 Feb 1983
Suzanne Takes You Down
S1E19 / 15 Mar 1983
The Fifth Wheel
S1E20 / 27 Mar 1983
Stage Fright (a.k.a. Video Jitters)
S1E21 / 03 Apr 1983Elyse D'Arc
S1E22 / 10 Apr 1983
Season 2
Tender is the Knight
S2E1 / 28 Sep 1983The Homecoming
S2E2 / 12 Oct 1983
The Harder They Fall
S2E3 / 19 Oct 1983
This Year's Model
S2E4 / 26 Oct 1983
Not An Affair to Remember
S2E5 / 02 Nov 1983
Speed Trap
S2E6 / 09 Nov 1983
Sweet Lorraine
S2E7 / 16 Nov 1983
Batter Up
S2E8 / 30 Nov 1983
A Keaton Christmas Carol
S2E9 / 14 Dec 1983
To Snatch a Keith
S2E10 / 21 Dec 1983
Birthday Boy
S2E11 / 05 Jan 1984
Go Tigers
S2E12 / 12 Jan 1984
"M" is for the Many Things
S2E13 / 19 Jan 1984
Say Uncle
S2E14 / 26 Jan 1984
Ladies' Man
S2E15 / 02 Feb 1984
Ready or Not
S2E16 / 09 Feb 1984
Double Date
S2E17 / 16 Feb 1984
Lady Sings the Blues
S2E18 / 23 Feb 1984
Baby Boy Doe
S2E19 / 08 Mar 1984
The Graduate
S2E20 / 15 Mar 1984
Diary of a Young Girl
S2E21 / 03 May 1984
Working At It
S2E22 / 10 May 1984
Season 3
The Gambler
S3E1 / 20 Sep 1984
Here We Go Again
S3E2 / 27 Sep 1984
Little Man on Campus
S3E3 / 04 Oct 1984
Love Thy Neighbor
S3E4 / 11 Oct 1984Keaton and Son
S3E5 / 18 Oct 1984
Fabric Smarts
S3E6 / 25 Oct 1984
Hotline Fever
S3E7 / 01 Nov 1984
4 Rms Ocn Vu
S3E8 / 08 Nov 1984
Best Man
S3E9 / 15 Nov 1984
Lost Weekend
S3E10 / 22 Nov 1984
Don't Kiss Me, I'm Only the Messenger
S3E11 / 29 Nov 1984
Help Wanted
S3E12 / 06 Dec 1984
Karen II, Alex 0
S3E13 / 13 Dec 1984
Oh Donna
S3E14 / 03 Jan 1985
Auntie Up
S3E15 / 10 Jan 1985
Philadelphia Story
S3E16 / 17 Jan 1985
Birth of a Keaton (1)
S3E17 / 24 Jan 1985
Birth of a Keaton (2)
S3E18 / 31 Jan 1985
Cry Baby
S3E19 / 07 Feb 1985
Don't Know Much About History...
S3E20 / 14 Feb 1985
Bringing Up Baby
S3E21 / 21 Feb 1985
Cold Storage
S3E22 / 07 Mar 1985
Remembrances of Things Past
S3E23 / 28 Mar 1985
Season 4
The Real Thing (1)
S4E1 / 26 Sep 1985
The Real Thing (2)
S4E2 / 03 Oct 1985
Mr. Wrong
S4E3 / 17 Oct 1985
Designated Hitter
S4E4 / 24 Oct 1985
Don't Go Changin'
S4E5 / 31 Oct 1985
The Old College Try
S4E6 / 07 Nov 1985
My Tutor
S4E7 / 14 Nov 1985
Mr. Right
S4E8 / 21 Nov 1985
Just One Look
S4E9 / 05 Dec 1985
How Do You Sleep?
S4E10 / 12 Dec 1985
You've Got a Friend
S4E11 / 19 Dec 1985
Nothing But a Man
S4E12 / 02 Jan 1986
The Disciple
S4E13 / 09 Jan 1986
Where's Poppa?
S4E14 / 16 Jan 1986
Fool for Love
S4E15 / 23 Jan 1986
Checkmate
S4E16 / 30 Jan 1986
Engine Trouble
S4E17 / 06 Feb 1986
A Word to the Wise
S4E18 / 13 Feb 1986
Art Lover
S4E19 / 20 Feb 1986
Teacher's Pet
S4E20 / 03 Mar 1986
My Buddy
S4E21 / 06 Mar 1986
Once in Love with Elyse (a.k.a. Loan Arranger)
S4E22 / 01 May 1986
Paper Chase (a.k.a. Mallory's Graduation)
S4E23 / 08 May 1986
Season 5
Be True to Your Preschool
S5E1 / 25 Sep 1986
Starting Over
S5E2 / 02 Oct 1986
The Freshman and the Senior
S5E3 / 09 Oct 1986
My Back Pages
S5E4 / 16 Oct 1986
Beauty and the Bank
S5E5 / 30 Oct 1986
Mrs. Wrong (1)
S5E6 / 06 Nov 1986
Mrs. Wrong (2)
S5E7 / 13 Nov 1986
The Big Fix
S5E8 / 17 Nov 1986
My Brother's Keeper
S5E9 / 20 Nov 1986
High School Confidential
S5E10 / 04 Dec 1986
Paper Lion
S5E11 / 11 Dec 1986
My Mother, My Friend
S5E12 / 18 Dec 1986
O'Brother (1)
S5E13 / 08 Jan 1987
O'Brother (2)
S5E14 / 15 Jan 1987
Higher Love
S5E15 / 22 Jan 1987
Architect's Apprentice
S5E16 / 29 Jan 1987
A Tale of Two Cities (1)
S5E17 / 05 Feb 1987
A Tale of Two Cities (2)
S5E18 / 12 Feb 1987
Battle of the Sexes
S5E19 / 19 Feb 1987
Band on the Run
S5E20 / 26 Feb 1987
Keaton vs. Keaton
S5E21 / 05 Mar 1987
A, My Name is Alex
S5E22 / 12 Mar 1987
"D" is for Date
S5E23 / 20 Mar 1987
Love Me Do
S5E24 / 30 Apr 1987
The Visit
S5E25 / 07 May 1987
Matchmaker
S5E26 / 23 Jul 1987
It's My Party (1)
S5E27 / 06 Aug 1987
It's My Party (2)
S5E28 / 13 Aug 1987
Season 6
The Last of the Red Hot Psychologists
S6E1 / 13 Sep 1987
Dear Mallory
S6E2 / 20 Sep 1987
The Other Woman
S6E3 / 27 Sep 1987
Dream Date
S6E4 / 04 Oct 1987
Super Mom
S6E5 / 18 Oct 1987
Walking On Air
S6E6 / 25 Oct 1987Invasion of the Psychologist Snatchers
S6E7 / 01 Nov 1987
The Way We Were
S6E8 / 08 Nov 1987
Mister Sister
S6E9 / 15 Nov 1987
Citizen Keaton
S6E10 / 22 Nov 1987
Father Time (1)
S6E11 / 29 Nov 1987
Father Time (2)
S6E12 / 06 Dec 1987
The American Family
S6E13 / 13 Dec 1987
Anniversary Waltz
S6E14 / 16 Dec 1987
Miracle in Columbus
S6E15 / 20 Dec 1987
The Play's the Thing
S6E16 / 10 Jan 1988
The Spirit of Columbus
S6E17 / 17 Jan 1988
The Blues Brother
S6E18 / 24 Jan 1988
Read It and Weep (1)
S6E19 / 07 Feb 1988
Read It and Weep (2)
S6E20 / 14 Feb 1988Quittin' Time
S6E21 / 21 Feb 1988
Spring Reminds Me (a.k.a. Rosalie's Legacy)
S6E22 / 28 Feb 1988
The Boys Next Door
S6E23 / 06 Mar 1988Sign of the Times
S6E24 / 13 Mar 1988
Return of the Native
S6E25 / 20 Mar 1988
Father, Can You Spare a Dime?
S6E26 / 01 May 1988
Season 7
It Happened One Night
S7E1 / 30 Oct 1988
Designing Woman
S7E2 / 06 Nov 1988
Truckers
S7E3 / 13 Nov 1988
Beyond Therapy
S7E4 / 27 Nov 1988
Heartstrings (1)
S7E5 / 04 Dec 1988
Heartstrings (2)
S7E6 / 11 Dec 1988
Heartstrings (3)
S7E7 / 18 Dec 1988
Basic Training
S7E8 / 01 Jan 1989
Deja Vu
S7E9 / 08 Jan 1989
Nick's Best Friend
S7E10 / 15 Jan 1989
Get Me to the Living Room on Time
S7E11 / 29 Jan 1989
The Job Not Taken
S7E12 / 05 Feb 1989
The Wrecker's Ball
S7E13 / 12 Feb 1989
My Best Friend's Girl
S7E14 / 19 Feb 1989
'Til Her Daddy Takes the T-Bird Away
S7E15 / 26 Feb 1989
Simon Says
S7E16 / 05 Mar 1989
All in the Neighborhood (1)
S7E17 / 12 Mar 1989
All in the Neighborhood (2)
S7E18 / 19 Mar 1989
They Can't Take That Away From Me (1)
S7E19 / 02 Apr 1989
They Can't Take That Away From Me (2)
S7E20 / 09 Apr 1989
Rain Forests Keep Falling on My Head
S7E21 / 16 Apr 1989
Wrap Around the Clock
S7E22 / 23 Apr 1989
Mr. Keaton Takes a Vacation
S7E23 / 07 May 1989Alex Doesn't Live Here Anymore
S7E24 / 14 May 1989
Meredith Baxter
Elyse Keaton
Michael Gross
Steven Keaton
Michael J. Fox
Alex P. Keaton
Justine Bateman
Mallory Keaton
Tina Yothers
Jennifer Keaton
