Mr. Peter Sam (1915-) was the former controller of the Skarloey Railway. He succeeded his father, Mr. Robert Sam, in 1951 and was hired by the new owner, Sir Handel Lloyd Brown. Like his father, he spent his entire working life on the Skarloey.

Mr. Peter Sam was rather strict and reprimanded engines whenever they would get into trouble; Sir Handel was most impressed by this. He was firm, but fair and once jokingly threatened to take Sir Handel to pieces when he pretended to be ill so he would not have to take part in the television event of Skarloey's 95th birthday. However, Duncan thought that the Thin Controller only picked on him.