Biography
Thomas Mark Harmon (born September 2, 1951) is an American actor, producer and director. He is known for playing the lead role of Leroy Jethro Gibbs on NCIS (2003-2021), a role which has earned him six nominations at the People's Choice Awards including a win for Favorite TV Crime Drama Actor in 2017. Since 2008, he has also been a producer and executive producer of the show as well as its' spinoff series NCIS: New Orleans. His character of NCIS special agent Leroy Jethro Gibbs was introduced in...
Known For
Complete Filmography

Freakier Friday
2025
as Ryan
Years after Tess and Anna endured an identity crisis, Anna now has a daughter of her own and a soon-to-be stepdaughter. As they navigate the myriad ch...

NCISverse: The First 1,000
2024
as Self
Kevin Frazier hosts a celebration of the "NCIS" franchise, including exclusive interviews with cast members and guest stars; new details about the ori...

The Wild
2019
as Self
Newly into addiction recovery, an urgent threat emerges to spur filmmaker, Mark Titus back to the Alaskan wilderness - where the people of Bristol Bay...

Certain Prey
2011
as Lucas Davenport
Minneapolis Deputy Police Chief, Lucas Davenport, has to face off against a duo unlike any he's ever encountered; a lethal hit woman and a ferociously...

Certain Prey
2011
Executive Producer
Minneapolis Deputy Police Chief, Lucas Davenport, has to face off against a duo unlike any he's ever encountered; a lethal hit woman and a ferociously...

Justice League: Crisis on Two Earths
2010
as Superman (voice)
A heroic version of Lex Luthor from an alternate universe appears to recruit the Justice League to help save his Earth from the Crime Syndicate, an ev...

Weather Girl
2009
as Dale
Succumbing to the stresses of her personal and professional lives, Sylvia, a Seattle morning show weather forecaster, has a meltdown live on-air. Now,...

Chasing Liberty
2004
as James Foster
The President's daughter, unable to experience life like a normal 18 year-old, escapes from her entourage of Secret Service agents while traveling in ...

Freaky Friday
2003
as Ryan
Mother and daughter bicker over everything -- what Anna wears, whom she likes and what she wants to do when she's older. In turn, Anna detests Tess's ...

Local Boys
2002
as Jim Wesley
On Skeet’s twelfth birthday his older brother Randy buys him his first surfboard. Suddenly his summer turns to the endless search for the perfect wave...
Intimate Portrait: Pam Dawber
2002
as Self
Details the life of actress Pam Dawber through interviews with those close to her and footage of her work.

And Never Let Her Go
2001
as Thomas Capano
The true story of a woman's suspicious disappearance after ending an affair with a powerful, married attorney.

Crossfire Trail
2001
as Bruce Barkow
Rafe Covington is as good as his word, and he's determined to keep his promise to a dying man that he'll look after the man's widow and Wyoming ranch....

The Amati Girls
2001
as Lawrence
Four sisters who disagree about everything... except what matters most. Family.

For All Time
2000
as Charles Lattimer
A man facing middle-age and a failing marriage finds a time slip that can take him back to the end of the nineteenth century.

I'll Remember April
1999
as John Cooper
Four young boys find a shipwrecked Japanese sailor during World War II and struggle with the decision to save him.

Fear and Loathing in Las Vegas
1998
as Magazine Reporter
Raoul Duke and his attorney Dr. Gonzo drive a red convertible across the Mojave desert to Las Vegas with a suitcase full of drugs to cover a motorcycl...

Casualties
1997
as Tommy Nance
A woman tormented by an abusive, sadistic husband desperately tries to find her way out of her predicament. She discovers that she may have found the ...

The First to Go
1997
as Jeremy Hampton
A romantic comedy about the first of a tight group of friends to get married.

The Last Supper
1995
as Dominant Male
A group of idealistic, but frustrated, liberals succumb to the temptation of murdering rightwing pundits for their political beliefs.

Magic in the Water
1995
as Jack Black
Radio psychologist Jack Black takes his children Joshua and Ashley on a 'vacation' to a lake in British Columbia. While he grinds away at work the chi...

Original Sins
1995
as Johnathan Franye
On Jonathan Frayne's radio talk show, the guilty call in to reveal their darkest sins. But when one mysterious caller confesses to murder, Jonathan is...

Natural Born Killers
1994
as Mickey Knox in TV
Two victims of traumatized childhoods become lovers and serial murderers irresponsibly glorified by the mass media.

Wyatt Earp
1994
as Sheriff Johnny Behan
From Wichita to Dodge City, to the O.K. Corral in Tombstone, Wyatt Earp is taught that nothing matters more than family and the law. Joined by his bro...

Cold Heaven
1992
as Alex Davenport
An adulterous woman's faith in God is tested when her husband dies and miraculously comes back to life.

Till There Was You
1991
as Frank Flynn
Frank Flynn is summonsed from New York by his brother Charlie to Vanuatu. He arrives only to find Charlie dead, and becomes involved with his late bro...

Shadow of a Doubt
1991
as Charles Spencer
Charlie is a young woman who is thrilled that her favorite Uncle Charlie is coming home for good. But she soon discovers that her namesake, a "Wall St...

Long Road Home
1991
as Ertie Robertson
A drama depicting the trials of a family of share croppers.

Fourth Story
1991
as David Shepard
Valerie's husband Darryl leaves for work as usual, but never returns. She hires private eye Shepard to find him. Soon he discovers that David had a se...

Dillinger
1991
as John Dillinger
Crime drama based on the real-life story of US gangster John Dillinger, who was hunted by the FBI after a string of armed bank robberies during the Gr...

Worth Winning
1989
as Taylor Worth
Taylor is a man who has no problems with women. So confident is he that he accepts a challenge from his friends: he has to secure proposals of marriag...

Sweet Bird of Youth
1989
as Chance Wayne
Tennessee William’s masterful melodrama about an aging movie star who, appalled by her own image on the screen, flees from her movie premiere and goes...

Stealing Home
1988
as Billy Wyatt
Billy Wyatt (Harmon), a former high school and minor-league baseball baseball player receives a telephone call from his mother revealing that his form...

The Presidio
1988
as Jay Austin
Jay Austin is now a civilian police detective. Colonel Caldwell was his commanding officer years before when he left the military police over a disagr...

After the Promise
1987
as Elmer Jackson
Elmer Jackson is a carpenter in a small Californian town in the 1930s. Struggling to bring up 4 young boys after the death of his wife, he is horrifie...

Dear America: Letters Home from Vietnam
1987
as (voice)
Real-life letters written by American soldiers, sailors, airmen, and Marines during the Vietnam War to their families and friends back home. Archive f...

Summer School
1987
as Mr. Freddy Shoop
A high-school gym teacher has big plans for the summer, but is forced to cancel them to teach a "bonehead" English class for misfit goof-off students....

Let's Get Harry
1986
as Harry
Harry Burck has been kidnapped by South American terrorists, and when the US Government refuses to intervene, Harry's friends decide to take matters i...

The Deliberate Stranger
1986
as Ted Bundy
Based on a true story, this film depicts the life of Ted Bundy, the serial killer. In 1974, after having murdered several young women, he leaves Seatt...

Prince of Bel Air
1986
as Robin Prince
A free-spirited, womanizing L.A. pool cleaner finds his lifestyle challenged by a new love interest.

Tuareg: Desert Warrior
1984
as Gacel Sayah
In a desolate section of the Sahara once ruled by the French, two thirsty men stumble into the camp of a Tuareg warrior where they're given water and ...

Intimate Agony
1983
as Tommy
Anthony Geary (General Hospital) stars as a compassionate doctor who must treat an STD outbreak at an upscale vacation resort. Judith Light (Law & Or...

Flamingo Road
1980
as Fielding Carlyle
A carnival drifter marries into an aristocratic family and unwillingly takes on a ruthless sheriff who fancies himself a political kingmaker in this p...

Beyond the Poseidon Adventure
1979
as Larry Simpson
After "The Poseidon Adventure", in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While the passengers are sti...

Comes a Horseman
1978
as Billy Joe Meynert
Ella Connors is a single woman who gets pressured to sell her failing cattle farm to her corrupt ex-suitor, Jacob Ewing. She asks for help from her ne...

Little Mo
1978
as Norman Brinker
Biopic about tennis great Maureen Connolly who, as a teenager, was the first woman to win the Grand Slam of Tennis, became world-renowned as "Little M...

Getting Married
1978
as Howie Lesser
A man falls madly in love with a pretty newscaster and goes all out to win her heart and her hand in marriage before she weds another man.
Eleanor and Franklin: The White House Years
1977
as Robert Dunlap
The story of Franklin and Eleanor Roosevelt during their 12-year stay at the White House.

Sonic Boom
1974
as Student Controller
Comedy short about a supersonic jet that lands in a small town and creates hysteria about an impending sonic boom that never happens.