Mark A. Sheppard is an English actor, producer and director. He started his career as a musician at the age of 15. He made his acting debut with the television series 'Silk Stalkings' in the year 1992. He shot to fame with the television series 'Supernatural' and has also written, directed and produced the film Room 101. He is also known for his work in Unstoppable and In the Name of the Father.