James Robert "Jamie" McCrimmon, son of Donald McCrimmon, a piper like his father and his father's father, was one of the longest serving companions to travel with the Doctor and the longest serving male companion to date.
Jamie first met the Doctor in the aftermath of the English defeat of the Jacobite Rebellion at the Battle of Culloden on 16 April 1746, during which he was the piper for Clan McLaren. Jamie and his fellow Highlanders faced either being hung, butchered by the Duke of Cumberland or sold into an unsurvivable seven-year slavery on the plantations in the West Indies. After escaping the gallows, an unsure Jamie was urged to follow the Second Doctor, Ben Jackson and Polly Wright into the mysterious TARDIS.
More often than not, Jamie wore a kilt with a red tartan. He was often chided for continuing to wear his kilt, even in situations where it was too cold to wear it. It was sometimes jokingly referred to as a dress or skirt, to which he would take offense.
Jamie was simple and straightforward, but he was also intelligent, practical and full of common sense. It was these qualities which often put him ahead of his companions. Although he didn't understand the TARDIS, he was enthusiastic about it. His journey was a voyage of discovery; and almost everything he experienced was new to him. He struggled to understand many things, yet he battled against this and thoroughly enjoyed his adventures.
Jamie saw the Doctor as a friend and mentor. He loved to travel and enjoyed his adventures. He learnt a lot through his experiences, but also believed the Doctor needed his help.