Marcus Richard Lloyd Owen is a British actor. Despite being born in London, he considers himself Welsh due to both his parents being from Wales and only having moved to London for purposes of professional progression. Trained at the National Youth Theatre and the Royal Academy of Dramatic Art (RADA) in London, he is known for portraying Indiana Jones's father Professor Dr. Henry Jones Sr. in The Young Indiana Jones Chronicles between 1992 and 1993 and Paul Bowman-MacDonald in the BBC Scotland series Monarch of the Glen from 2002 to 2005. He starred as solicitor William Heelis in the film Miss Potter (2006) and commander Nathan Walker in Apollo 18 (2011). He plays the role of Elendil in the Amazon Prime fantasy series The Lord of the Rings: The Rings of Power (2022).

Professor Henry Walton Jones Sr. is a fictional character in the Indiana Jones franchise. He is the Scottish father of Indiana Jones and is a professor of medieval studies at Princeton University. Alongside his academic teachings, Jones Sr. is an author of many books and a professional speaker on his historical subject at many conferences throughout the world. His relationship to his son in the franchise is noted as indifferent due to conflicts on their approaches to their situations, despite the fondness they share for history and archaeology. Much of his life was dedicated to research into the Holy Grail of Christian legend.