Mr. Solo was a fictional American gangster and mafia boss working with infamous billionaire, Auric Goldfinger. A minor antagonist based on the literary character of the same name appeared in Ian Fleming's 1961 novel, he appeared in the 1964 James Bond film Goldfinger and was portrayed by the late British actor Martin Benson.
Mr. Solo happens to be one of the crime bosses (alongside Jack Strap and Jed Midnight) contacted by Goldfinger in his Kentucky home to learn about his plot, and that Strap had smuggled a laser shipped from Switzerland. At first, Solo gets impatient and demanded for $1 million for delivering the laser, but Goldfinger reveals his plot called "Operation Grand Slam", which would involve spreading nerve gas across the area of Fort Knox that can kill all the guards so that he can send his private task force to use the laser to raid the fort. Goldfinger then proclaims that he would use the stolen gold bullion to pay the millions of dollars to the crime bosses as promised. Though the other crime bosses find Goldfinger's proposal to be quite fair and accept it, Solo refuses to be involved in it as he still demands his money. Obliging to Solo's demands, Goldfinger arranges for $1 million in gold bullion to be placed in the trunk of a Lincoln Continental car provided by Goldfinger. However, it turns out that the businessman actually plans to destroy the gold rather than stealing it so that the value of his gold will increase to become the richest man in the world, and that he has no intention in paying Solo and the other crime bosses. With that in mind, Goldfinger gets Kisch to seal the room and spray the nerve gas, killing all the other crime bosses. In the meantime, while Solo is about to get in the car, James Bond, unnoticed, slips a piece of paper with details of "Operation Grand Slam" into Solo's pocket along with a tracking device for his friend Felix Leiter to find him. Goldfinger's henchman Oddjob drives Solo to the airport but, part way there, pulls onto a side-road and shoots the gangster to dead with a gun. Oddjob then takes the car to a wrecking yard where it is placed in a scrap metal crusher with Solo's body still in the back seat. Felix Leiter, who was chasing them believeing to be following Bond, loses the tracking signal.
- His surname would be used a few months later for Napoleon Solo in the The Man From U.N.C.L.E. TV show, which was co-created by Ian Fleming shortly before he died.
- His death may have inspired that of Leland Turbo from Cars 2 (a film bearing great similarities to Bond films as homages and references).