Mack was the adventurous type, always wanting to take part in a big exciting adventure.  So when his father found the Crown of the God and made Power Rangers to defend it, Mack wanted in on the action.  However, Mr. Hartford's love for his son was the stronger force, in that, he did not want to put his son in harms way.

But after taking matters into his own hands, Mack took the Red Ranger's Overdrive Tracker and proved himself worthy of the role of Red Ranger, not only to his father, but the other Rangers as well.  Though he may have doubted himself on occasion, his father and his team believed in him.

Mack led the team as Red Ranger, and with his Genetically Enhanced Super Strength, was a force to be reckoned with.

As time went on, a mystery started surround Mack and his childhood.  For one, according to Spencer & Andrew, Mack should not have been effected by Bad Luck.  Then when Mack showed a picture of him as a kid, he was not casting a shadow in the photograph like anyone would normally.

Finally, when Mack had a strange reaction to a computer virus the command center caught, it was revealed that the Red Ranger was not a human, but an android created by Mr. Hartford, and brought online a little over two years ago.

Since Andrew was always too busy with his work, he never had time for the social dating life, so in order to have a son, he created Mack and gave him made up memories of a childhood that never really existed.

With Mack learning the truth, he began distancing himself from his "Father", but remained loyal to his fellow teammates in their quest to protect the world.  Mack felt like since he wasn't a real human, that he wasn't Andrew's son, and he was also the one Ranger was to dispensable.

When Flurious attacked the Hartford mansion, he threatened to destroy Mack if the others did not give him the four other Jewels of the Crown.  Though Mack did not want them to, Andrew & the Rangers surrendered the Jewels.  Mack later asked Mr. Hartford why he did it, and Andrew told him it's because he loved Mack.  It was then that Mack realized that it didn't matter if he wasn't a real human, that Andrew loved him just like any father would love his son.

During the final battle with Flurious, the crown transformed Flurious into an even more powerful monster.  Luckily, the Red Ranger was able to use his Sentinel Ranger Mode to destroy Flurious' monster form, and free the crown.  Then, to destroy Flurious for good, Mack overloaded himself and the Sentinel Ranger armor.

Sadly, Mack had sacrificed himself in order to destroy Flurious.  But the Sentinel Knight appeared, with the Corona Aurora, and explained that though the Crown holds great destructive power, it can also give life.  By placing the crown on Mack's head, Mack was not only repaired, but he was turned into a real human being.

With all evil destroyed, and Mack being real human, he now joins Mr. Hartford in his treasure quests for relics and artifacts.