He co-starred as Quintus in Ridley Scott's Gladiator (2000), the Dreamworks-Universal movie and winner of five Oscars, including Best Picture, co-starring Russell Crowe, Joaquin Phoenix, Connie Nielsen, Richard Harris, Derek Jacobi, and Oliver Reed. Three of Tomas Arana's more recent films are: La volpe a tre zampe (2005), directed by Sandro Dionisio, a Teatri Uniti (Angelo Curti)/Cattelya Production that co-stars Miranda Otto, Angela Luce, and Nadja Uhl; Outpatient (2002), directed by Alec Carlin, with Justin Kirk and Catherine Kellner and the Jean-Claude Van Damme action film, Derailed (2002), directed by Bob Misiorowski. He was in Chimera (2001), directed by Pappi Corsicato, with Iaia Forte and Tommaso Ragno. He has appeared in more than 40 films, ranging from large budget Hollywood Studio pictures to Independent films in both the U.S. and Europe. His studio pictures include L.A. Confidential (1997) (as Bruening, a rogue cop), The Bodyguard (1992) (as Portman, Kevin Costner's antagonist and Whitney Houston's assassin), The Hunt for Red October (1990) (as Loginov, the Russian Saboteur), Tombstone (1993), and First Kid (1996).