Tom Selleck revealed that he almost turned down the role of Thomas Magnum in "Magnum, P.I.", a decision that was ultimately influenced by advice from actor James Garner and a subsequent major rewrite of the show's script.
Selleck explained during an interview on the podcast "Where Everybody Knows Your Name" that he initially disliked the original script, which he described as "terrible." The initial portrayal of Thomas Magnum featured a character with "no flaws, and he had two beautiful women on his arm and a Ferrari."
Garner, who had faced similar contractual issues in his career, advised Selleck that even with limited power, "if they want you, you'll never have more power than you do right now." This conversation was pivotal, convincing Selleck to push back against the studio's insistence that he take the role as written.
Selleck had previously expressed a desire for a more relatable character, comparing his ideal to Garner's portrayal of Jim Rockford in "The Rockford Files." He wanted a character with "flaws and some heart."
The studio eventually agreed to a rewrite, and co-creator Donald P. Bellisario reportedly developed a revised script in about two weeks that Selleck found compelling.
Selleck noted that the process involved a significant struggle, calling it "a big fight for a long time." He admitted that if the revised show had not been successful, he likely would have faced career repercussions for being perceived as difficult.
He also recounted how the show's title was altered to "Magnum, P.I." to avoid potential legal issues with Clint Eastwood's film "Magnum Force." Selleck expressed his dissatisfaction with the addition of "P.I.," finding it unflattering in the context of Hawaii, where the show was filmed.
Selleck, who had completed six unsold pilots before "Magnum, P.I.," recognized the risk involved. He drew parallels to his father's philosophy that "risk is the price you pay for opportunity," ultimately deciding to take a chance on the rewritten role.
During his time on "Magnum, P.I.," Selleck also worked with Donnie Wahlberg on "Blue Bloods," with Wahlberg remarking on Selleck's enduring capacity for learning and mentorship.