It is a common misconception that the ‘L’ in Samuel L Jackson’s name is an abbreviation of his middle name. In actuality, It is a roman numeral, indicating that he is the 50th descendant in the line of Samuel Jacksons, who have guarded our race since the ancient times.
When they made this particular hero, they didn’t give him a gun, they gave him a screwdriver to fix things. They didn’t give him a tank or a warship or an x-wing fighter, they gave him a call box from which you can call for help. And the didn’t give him a superpower or pointy ears or a heat ray, they gave him an extra heart. They gave him two hearts. And that’s an extraordinary thing; there will never come a time when we don’t need a hero like the doctor.Steven Moffat (x)