Possible Clues:

• The Lord of the Rings character first introduced as Strider
• King in 'The Return of the King'
• Ally of Frodo
• One of the main protagonists in Tolkien's 'The Lord of the Rings'
• Strider's element, both in short and with late run
• Three-time Viggo Mortensen role
• 'The Return of the King' king