S08E25: April Fools
A no-nonsense Colonel, who is notorious as a hard-nosed disciplinarian, visits the 4077th during an outbreak of April Fools' Day pranksterism. Colonel Potter tries in vain to halt the mayhem before Colonel Tucker arrives in camp.
Previous Episode 
Season 1
Pilot
S1E1 / 17 Sep 1972
To Market, to Market
S1E2 / 24 Sep 1972
Requiem for a Lightweight
S1E3 / 01 Oct 1972
Chief Surgeon Who?
S1E4 / 08 Oct 1972
The Moose
S1E5 / 15 Oct 1972
Yankee Doodle Doctor
S1E6 / 22 Oct 1972
Bananas, Crackers and Nuts
S1E7 / 05 Nov 1972
Cowboy
S1E8 / 12 Nov 1972
Henry Please Come Home
S1E9 / 19 Nov 1972
I Hate a Mystery
S1E10 / 26 Nov 1972
Germ Warfare
S1E11 / 10 Dec 1972
Dear Dad
S1E12 / 17 Dec 1972
Edwina
S1E13 / 24 Dec 1972
Love Story
S1E14 / 07 Jan 1973
Tuttle
S1E15 / 14 Jan 1973
The Ringbanger
S1E16 / 21 Jan 1973
Sometimes You Hear the Bullet
S1E17 / 28 Jan 1973
Dear Dad...Again
S1E18 / 04 Feb 1973
The Longjohn Flap
S1E19 / 17 Feb 1973
The Army-Navy Game
S1E20 / 25 Feb 1973
Sticky Wicket
S1E21 / 04 Mar 1973
Major Fred C. Dobbs
S1E22 / 11 Mar 1973
Ceasefire
S1E23 / 18 Mar 1973
Showtime
S1E24 / 25 Mar 1973
Season 2
Divided We Stand
S2E1 / 15 Sep 1973
5 O’Clock Charlie
S2E2 / 22 Sep 1973
Radar’s Report
S2E3 / 29 Sep 1973
For the Good of the Outfit
S2E4 / 06 Oct 1973
Dr. Pierce and Mr. Hyde
S2E5 / 13 Oct 1973
Kim
S2E6 / 20 Oct 1973
L.I.P. (Local Indigenous Personnel)
S2E7 / 27 Oct 1973
The Trial of Henry Blake
S2E8 / 03 Nov 1973
Dear Dad... Three
S2E9 / 10 Nov 1973
The Sniper
S2E10 / 17 Nov 1973
Carry On, Hawkeye
S2E11 / 24 Nov 1973
The Incubator
S2E12 / 01 Dec 1973
Deal Me Out
S2E13 / 08 Dec 1973
Hot Lips and Empty Arms
S2E14 / 15 Dec 1973
Officers Only
S2E15 / 22 Dec 1973
Henry in Love
S2E16 / 05 Jan 1974
For Want of a Boot
S2E17 / 12 Jan 1974
Operation Noselift
S2E18 / 19 Jan 1974
The Chosen People
S2E19 / 26 Jan 1974
As You Were
S2E20 / 02 Feb 1974
Crisis
S2E21 / 09 Feb 1974
George
S2E22 / 16 Feb 1974
Mail Call
S2E23 / 23 Feb 1974
A Smattering of Intelligence
S2E24 / 02 Mar 1974
Season 3
The General Flipped at Dawn
S3E1 / 10 Sep 1974
Rainbow Bridge
S3E2 / 17 Sep 1974
Officer of the Day
S3E3 / 24 Sep 1974
Iron Guts Kelly
S3E4 / 01 Oct 1974
O.R.
S3E5 / 08 Oct 1974
Springtime
S3E6 / 15 Oct 1974
Check-Up
S3E7 / 22 Oct 1974
Life With Father
S3E8 / 29 Oct 1974
Alcoholics Unanimous
S3E9 / 12 Nov 1974
There is Nothing Like a Nurse
S3E10 / 19 Nov 1974
Adam's Ribs
S3E11 / 26 Nov 1974
A Full Rich Day
S3E12 / 03 Dec 1974
Mad Dogs and Servicemen
S3E13 / 10 Dec 1974
Private Charles Lamb
S3E14 / 31 Dec 1974
Bombed
S3E15 / 07 Jan 1975
Bulletin Board
S3E16 / 14 Jan 1975
The Consultant
S3E17 / 21 Jan 1975
House Arrest
S3E18 / 04 Feb 1975
Aid Station
S3E19 / 11 Feb 1975
Love and Marriage
S3E20 / 18 Feb 1975
Big Mac
S3E21 / 25 Feb 1975
Payday
S3E22 / 04 Mar 1975
White Gold
S3E23 / 11 Mar 1975
Abyssinia, Henry
S3E24 / 18 Mar 1975
Season 4
Welcome to Korea
S4E1 / 12 Sep 1975
Change of Command
S4E2 / 19 Sep 1975
It Happened One Night
S4E3 / 26 Sep 1975
The Late Captain Pierce
S4E4 / 03 Oct 1975
Hey, Doc
S4E5 / 10 Oct 1975
The Bus
S4E6 / 17 Oct 1975
Dear Mildred
S4E7 / 24 Oct 1975
The Kids
S4E8 / 31 Oct 1975
Quo Vadis, Captain Chandler
S4E9 / 07 Nov 1975
Dear Peggy
S4E10 / 11 Nov 1975
Of Moose and Men
S4E11 / 21 Nov 1975
Soldier of the Month
S4E12 / 28 Nov 1975
The Gun
S4E13 / 02 Dec 1975
Mail Call, Again
S4E14 / 09 Dec 1975
The Price of Tomato Juice
S4E15 / 16 Dec 1975
Dear Ma
S4E16 / 23 Dec 1975
Der Tag
S4E17 / 06 Jan 1976
Hawkeye
S4E18 / 13 Jan 1976
Some 38th Parallels
S4E19 / 20 Jan 1976
The Novocaine Mutiny
S4E20 / 27 Jan 1976
Smilin' Jack
S4E21 / 03 Feb 1976
The More I See You
S4E22 / 10 Feb 1976
Deluge
S4E23 / 17 Feb 1976
The Interview
S4E24 / 24 Feb 1976
Season 5
Bug Out
S5E1 / 21 Sep 1976
Margaret's Engagement
S5E2 / 28 Sep 1976
Out of Sight, Out of Mind
S5E3 / 05 Oct 1976
Lt. Radar O'Reilly
S5E4 / 12 Oct 1976
The Nurses
S5E5 / 19 Oct 1976
The Abduction of Margaret Houlihan
S5E6 / 26 Oct 1976
Dear Sigmund
S5E7 / 09 Nov 1976
Mulcahy's War
S5E8 / 16 Nov 1976
The Korean Surgeon
S5E9 / 23 Nov 1976
Hawkeye Get Your Gun
S5E10 / 30 Nov 1976
The Colonel's Horse
S5E11 / 07 Dec 1976
Exorcism
S5E12 / 14 Dec 1976
Hawk's Nightmare
S5E13 / 21 Dec 1976
The Most Unforgettable Characters
S5E14 / 04 Jan 1977
38 Across
S5E15 / 11 Jan 1977
Ping Pong
S5E16 / 18 Jan 1977
End Run
S5E17 / 25 Jan 1977
Hanky Panky
S5E18 / 01 Feb 1977
Hepatitis
S5E19 / 08 Feb 1977
The General's Practitioner
S5E20 / 15 Feb 1977
Movie Tonight
S5E21 / 22 Feb 1977
Souvenirs
S5E22 / 01 Mar 1977
Post Op
S5E23 / 08 Mar 1977
Margaret's Marriage
S5E24 / 15 Mar 1977
Season 6
Fade Out, Fade In
S6E1 / 20 Sep 1977
Fallen Idol
S6E2 / 27 Sep 1977
Last Laugh
S6E3 / 04 Oct 1977
War of Nerves
S6E4 / 11 Oct 1977
The Winchester Tapes
S6E5 / 18 Oct 1977
The Light That Failed
S6E6 / 25 Oct 1977
In Love and War
S6E7 / 01 Nov 1977
Change Day
S6E8 / 08 Nov 1977
Images
S6E9 / 15 Nov 1977
The M*A*S*H Olympics
S6E10 / 22 Nov 1977
The Grim Reaper
S6E11 / 29 Nov 1977
Comrades in Arms: Part 1
S6E12 / 06 Dec 1977
Comrades in Arms: Part 2
S6E13 / 13 Dec 1977
The Merchant of Korea
S6E14 / 20 Dec 1977
The Smell of Music
S6E15 / 03 Jan 1978
Patent 4077
S6E16 / 10 Jan 1978
Tea and Empathy
S6E17 / 17 Jan 1978
Your Hit Parade
S6E18 / 24 Jan 1978
What's Up, Doc?
S6E19 / 30 Jan 1978
Mail Call Three
S6E20 / 06 Feb 1978
Temporary Duty
S6E21 / 13 Feb 1978
Potter's Retirement
S6E22 / 20 Feb 1978
Dr. Winchester and Mr. Hyde
S6E23 / 27 Feb 1978
Major Topper
S6E24 / 27 Mar 1978
Season 7
Commander Pierce
S7E1 / 18 Sep 1978
Peace On Us
S7E2 / 25 Sep 1978
Lil
S7E3 / 02 Oct 1978
Our Finest Hour
S7E4 / 09 Oct 1978
The Billfold Syndrome
S7E5 / 16 Oct 1978
None Like It Hot
S7E6 / 23 Oct 1978
They Call the Wind Korea
S7E7 / 30 Oct 1978
Major Ego
S7E8 / 06 Nov 1978
Baby, It's Cold Outside
S7E9 / 13 Nov 1978
Point of View
S7E10 / 20 Nov 1978
Dear Comrade
S7E11 / 27 Nov 1978
Out of Gas
S7E12 / 04 Dec 1978
An Eye for a Tooth
S7E13 / 11 Dec 1978
Dear Sis
S7E14 / 18 Dec 1978
B.J. Papa San
S7E15 / 01 Jan 1979
Inga
S7E16 / 08 Jan 1979
The Price
S7E17 / 15 Jan 1979
The Young and the Restless
S7E18 / 22 Jan 1979
Hot Lips Is Back in Town
S7E19 / 29 Jan 1979
C*A*V*E
S7E20 / 05 Feb 1979
Rally 'Round the Flagg, Boys
S7E21 / 14 Feb 1979
Preventative Medicine
S7E22 / 19 Feb 1979
A Night at Rosie's
S7E23 / 26 Feb 1979
Ain't Love Grand
S7E24 / 05 Mar 1979
The Party
S7E25 / 12 Mar 1979
Season 8
Too Many Cooks
S8E1 / 17 Sep 1979
Are You Now, Margaret?
S8E2 / 24 Sep 1979
Guerilla My Dreams
S8E3 / 01 Oct 1979
Good-Bye Radar: Part 1
S8E4 / 08 Oct 1979
Good-Bye Radar: Part 2
S8E5 / 15 Oct 1979
Period of Adjustment
S8E6 / 22 Oct 1979
Nurse Doctor
S8E7 / 29 Oct 1979
Private Finance
S8E8 / 05 Nov 1979
Mr. and Mrs. Who?
S8E9 / 12 Nov 1979
The Yalu Brick Road
S8E10 / 19 Nov 1979
Life Time
S8E11 / 26 Nov 1979
Dear Uncle Abdul
S8E12 / 03 Dec 1979
Captains Outrageous
S8E13 / 10 Dec 1979
Stars and Stripes
S8E14 / 17 Dec 1979
Yessir, That's Our Baby
S8E15 / 31 Dec 1979
Bottle Fatigue
S8E16 / 07 Jan 1980
Heal Thyself
S8E17 / 14 Jan 1980
Old Soldiers
S8E18 / 21 Jan 1980
Morale Victory
S8E19 / 28 Jan 1980
Lend a Hand
S8E20 / 04 Feb 1980
Goodbye, Cruel World
S8E21 / 11 Feb 1980
Dreams
S8E22 / 18 Feb 1980
War Co-Respondent
S8E23 / 03 Mar 1980
Back Pay
S8E24 / 10 Mar 1980
April Fools
S8E25 / 24 Mar 1980
Season 9
The Best of Enemies
S9E1 / 17 Nov 1980
Letters
S9E2 / 24 Nov 1980
Cementing Relationships
S9E3 / 01 Dec 1980
Father's Day
S9E4 / 08 Dec 1980
Death Takes a Holiday
S9E5 / 15 Dec 1980
A War for All Seasons
S9E6 / 29 Dec 1980
Your Retention Please
S9E7 / 05 Jan 1981
Tell It to the Marines
S9E8 / 12 Jan 1981
Taking the Fifth
S9E9 / 19 Jan 1981
Operation Friendship
S9E10 / 26 Jan 1981
No Sweat
S9E11 / 02 Feb 1981
Depressing News
S9E12 / 09 Feb 1981
No Laughing Matter
S9E13 / 16 Feb 1981
Oh, How We Danced
S9E14 / 23 Feb 1981
Bottoms Up
S9E15 / 02 Mar 1981
The Red/White Blues
S9E16 / 09 Mar 1981
Bless You, Hawkeye
S9E17 / 16 Mar 1981
Blood Brothers
S9E18 / 06 Apr 1981
The Foresight Saga
S9E19 / 13 Apr 1981
The Life You Save
S9E20 / 04 May 1981
Season 10
That's Show Biz
S10E1 / 26 Oct 1981
Identity Crisis
S10E2 / 02 Nov 1981
Rumor at the Top
S10E3 / 09 Nov 1981
Give 'em Hell, Hawkeye
S10E4 / 16 Nov 1981
Wheelers and Dealers
S10E5 / 23 Nov 1981
Communication Breakdown
S10E6 / 30 Nov 1981
Snap Judgment (1)
S10E7 / 07 Dec 1981
Snappier Judgment (2)
S10E8 / 14 Dec 1981
'Twas the Day after Christmas
S10E9 / 28 Dec 1981
Follies of the Living - Concerns of the Dead
S10E10 / 04 Jan 1982
The Birthday Girls
S10E11 / 11 Jan 1982
Blood and Guts
S10E12 / 18 Jan 1982
A Holy Mess
S10E13 / 01 Feb 1982
The Tooth Shall Set You Free
S10E14 / 08 Feb 1982
Pressure Points
S10E15 / 15 Feb 1982
Where There's a Will, There's a War
S10E16 / 22 Feb 1982
Promotion Commotion
S10E17 / 01 Mar 1982
Heroes
S10E18 / 15 Mar 1982
Sons and Bowlers
S10E19 / 22 Mar 1982
Picture This
S10E20 / 05 Apr 1982
That Darn Kid
S10E21 / 12 Apr 1982
Season 11
Hey, Look Me Over
S11E1 / 25 Oct 1982
Trick or Treatment
S11E2 / 01 Nov 1982
Foreign Affairs
S11E3 / 08 Nov 1982
The Joker is Wild
S11E4 / 15 Nov 1982
Who Knew?
S11E5 / 22 Nov 1982
Bombshells
S11E6 / 28 Nov 1982
Settling Debts
S11E7 / 06 Dec 1982
The Moon is Not Blue
S11E8 / 13 Dec 1982
Run For the Money
S11E9 / 20 Dec 1982
U.N., the Night and the Music
S11E10 / 03 Jan 1983
Strange Bedfellows
S11E11 / 10 Jan 1983
Say No More
S11E12 / 24 Jan 1983
Friends and Enemies
S11E13 / 07 Feb 1983
Give and Take
S11E14 / 14 Feb 1983
As Time Goes By
S11E15 / 21 Feb 1983
Goodbye, Farewell and Amen
S11E16 / 28 Feb 1983
Alan Alda
Hawkeye Pierce
Mike Farrell
B. J. Hunnicutt
Harry Morgan
Sherman Potter
Loretta Swit
Margaret Houlihan
David Ogden Stiers
Charles Winchester
Jamie Farr
Cpl. Maxwell Klinger
