Eric Christian Olsen, known for his role as Marty Deeks on NCIS Los Angeles, appeared in Smallville and looked different. In Smallville, Olsen played the villain Harry Volk, a younger and clean-shaven character. Harry was a pianist who sought revenge on his teacher after his dreams were shattered. After serving time in prison, he was released and rejuvenated by radioactive meteorites, but was eventually defeated by Clark Kent and his friends. NCIS Los Angeles and Smallville can be watched on CBS, The CW, and Channel 4.