Luis Diaz

Luis Diaz was Senator John Donovan's maternal uncle, and a political operative for his nephew's campaign for President of the United States.

In the afternoon of Day 10, at Henry Donovan's fundraiser, John greeted his uncle, speaking in Spanish before Henry jokingly told them to cut it out. Henry showed John a troubling attack ad by the Gage campaign indicating that Nilaa Mizrani had prayed at the radical Parkland Mosque. Luis showed John photographs proving that Nilaa had been there.

Luis was aiding Donovan, who was the real source of the leak of the Rangers' identities. He helped frame Nilaa Mizrani for it. ("Day 10: 2:00pm-3:00pm")

Luis was later found out to be a part of the conspiracy, but when Henry confronted him after learning the terrorists he supported kidnapped John, Luis attacked Henry and fled. ("9:00pm-10:00pm")

Background information and notes

• Along with Aisha and Jerome, Diaz is one of the minor antagonists of the season who was last seen evading the authorities and was never seen/mentioned again. Diaz's involvement in the conspiracy, and whether or not he was caught or otherwise faced justice later, is unknown.
• Daniel Zacapa, the actor who played Luis, is only four years Jimmy Smits' senior.
• There is speculation that he is related to Vanessa Diaz, as a result of his surname being revealed later in the season, their similar appearances, and Luis' signature glasses recalling those of Vanessa's in Solitary.