|Real Name:||Jack S Dalton Jr.|
|Originally From:||Texas, USA|
|Current Location:||Los Angeles, Califonia|
|Interests:|| Sarah Adler (Ex) |
Vera Kazakova (Unreciprocated)
Diane Davis (Ex)
|Parents:||Jack S. Dalton, Sr. (Father) †|
|Affiliations:|| The Phoenix Foundation |
|First appearance:||The Rising|
|Portrayed by:||George Eads|
Jack Dalton is an agent of The Phoenix Foundation and has an impressive military background.
Unlike his partner, Jack prefers to convey his thoughts and doubts in the open rather than bottle his emotions up. This has led him to wrong way to his rather blunt nature, but he does have a sense of humor. Being the least scientifically inclined of the team, Jack tries to keep up with Mac's creative solutions as best as he can, but he has learned to trust his partner's ingenious methods as they have saved their lives more than once and knows him the best, having served together and working as partners for the Phoenix Foundation.
While he is portrayed as a womanizer, Jack has had a few meaningful relationships, namely with his ex-partner, Sarah Adler, and Riley's mother, Diane, and despite having ended their relationships with them, both women are on good terms with him.
Jack's only other relationship in the series, aside from Mac, is with Riley. When he was working with the CIA, he dated Diane and he and Riley grew so close, they developed a father-daughter bond. However, after fighting off Riley's abusive father, Jack left both her and Diane, leaving Riley bitter about the situation. After being recruited into the Phoenix Foundation, their relationship was fairly strained, mostly due to Riley's antagonistic attitude towards him, but over time, the two repaired their relationship and are on friendlier terms.
- Expert hand-to-hand combatant: Because of his Delta Force background, Jack is able to hold his own in any fight.
- Expert Marksman: Because of career as a Delta force operative, Jack is a skilled marksman, able to handle anything from handguns to sniper rifles with frightening accuracy.
- Expert Tactician: While he usually leaves the strategies to Mac, Jack is skilled in the use of tactics, able to properly identify disguised mercenaries by their accessories and coordinate a strike force on a cartel safehouse to save MacGyver.
- Multilingual: From his career in the CIA, Jack can speak and understand French, Russian and Dutch.
- According to Jack, Matilda Webber hung up on (Russian Dictator Vladimir) Putin and he called back 10 minutes later & apologized. She also made the director of the NSA cry. 
- Jack received lacerations and bruises to his face, and a possibly broken hand. 
- Both MacGyver and Dalton received concussions from their helicopter crash in Kazakhstan. 
- Knows Steve McGarrett from their time in the military together, the two have an ongoing friendly rivalry between Delta Force and the Navy SEALs.
- Revealed to have previously dated Riley Davis's mom, Diane Davis.  
- Jack's father's birthday was on September 29, 1945. The original series premiered on September 29, 1985, exactly forty years later. 
- Axial fracture to his left radius. 
- Jack stone cold flunked out of med school, Cage called him on lying, he said he seriously thought about it. 
- Jack punched Riley's abusive dad for hitting her mom.
- Mac and Jack were stranded in Siberia for 3 days. They both received severe frost bite. 
- Jack was arrested in Yemen under a cover ID, and Angus MacGyver coordinated his release. 
- Jack killed 4 people with 2 bullets in Afghanistan to save Mac. 
- Angus MacGyver loses his grandfather’s pocket knife to a monkey in South America, in exchange for a bomb switch. Jack buys him a new one. 
- Sleeps with Dawn. 
- Received severe burns on his feet from being inside an incinerator. 
- Broke his leg in 1997 in Botswana.
- A fan of Star Wars as he regularly makes references to the movies and has an admiration for Han Solo.
- Jack Dalton has the following on his bucket list;
|The Rising||Metal Saw||Awl||Wire Cutter||Toothpick||Wrench||Can Opener||Corkscrew||Chisel||Pliers||Scissors|
|Screwdriver||Large Blade||Fish Scaler||Magnifying Glass||Hook||Ruler||Flashlight||Compass||Hole Puncher||Cigar Cutter|
|DIY or Die||Roulette Wheel + Wire||Muscle Car + Paper Clips||X-Ray + Penny||Skull + Electromagnet||Jet Engine + Pickup Truck||Duct Tape + Jack||Packing Peanuts + Fire||CD-ROM + Hoagie Foil||War Room + Ship||Bullet + Pen||Mac + Jack|
|CO2 Sensor + Tree Branch||Mardi Gras Beads + Chair||Murdoc + Handcuffs||Hammock + Balcony||Bear Trap + Mob Boss||Riley + Airplane||Benjamin Franklin + Grey Duffle||Skyscraper + Power||Wind + Water||UFO + Area 51||MacGyver + MacGyver|