In the 2000s and 2010s, the films Fernandez-Gil has acted in include Asian Stories (Book 3), The Boys & Girls Guide to Getting Down and Jack and Jill; the television shows Fernandez-Gil has acted in include The Mentalist, Mike & Molly, Punk'd and Ray Donovan.
Fernandez-Gil portrays the character of Dario Cueto in the professional wrestling television series Lucha Underground, as the storyline Spanish owner and promoter of Lucha Underground. El Rey Network, which airs Lucha Underground, described the character as Lucha Underground's "proprietor" with characteristic "bloodlust" and "seemingly endless amounts of money". It also added that Cueto's "crowning achievement" is his Temple in Boyle Heights, in reference to the warehouse where both seasons of the television series have been filmed.
The first taping of Lucha Underground occurred on September 6, 2014, with Cueto debuting in the series' first episode on October 29, 2014. Cueto had made an earlier appearance with a speech at Triplemanía XXII in 2014 where he invited the luchadores of AAA to participate in his Temple.
On the December 17, 2014 episode, Cueto introduced the Lucha Underground Championship, declaring that the winner of his created Aztec Warfare match would be the new champion. On the April 1, 2015 episode, Cueto introduced the Lucha Underground Trios Championship and started a tournament to crown the inaugural champions.
On the May 27, 2015 episode, Cueto ordered that for their failings, one of the Crew would be sacrificed to Cueto's brother. Cortez Castro and Mr. Cisco turned on Bael, assisting in the implied killing by Cueto's brother. On the next episode, Cueto imprisoned Black Lotus for trying to kill his brother. Lotus was captured by Chavo Guerrero and the Crew, as Guerrero betrayed Lotus to Cueto in exchange for protection from Mexican enemies.