In one episode, Garrett said that he's not "gifted", but Raina is... Raina said there's a question she would have asked the Clairvoyant, if he had turned out to be "gifted"... She was more disappointed than Quinn was, because she was the one who had been tasked with taking gifts out of people like Scorch.
Garrett says that they plan to continue to "change the world" with whatever it is they're doing, but never really specified what their goals are. Raina might know the true goals of project centipede...Garrett gave Raina the equipment to continue working and revealed how they're trying to bring soldiers back; however, we still don't know why they want this ability... Wouldn't it be nice if Nash could somehow fix up his body?...And what are they gonna do with their cyborg/undead army...Project Deathlok is taken straight from the comics, I believe Cybertek is a subsidiary of Roxxon oil & the head of Roxxon oil was replaced by Hydra after Trevor actually did shoot him in the head... Only some of the authorities knew that part of Mandarin's act was real. Garrett's con artist act was enough to convince Raina to continue helping them but it wasn't enough to sell me... I simply won't be sold until Raina's story ends... I don't believe for one second that Garrett knows everything about the true goals of Project Centipede, there's a lot of stuff he said where there could be two ways about it and he remains vague on some things..
Lots of little things that make me uncertain. Even the way Garrett speaks at times, admits to being a liar, a con-artist, not a con-man but a con artist. Capable of creating convincing and elaborate cover stories; a true artist, like "Trevor" with his Mandarin character... "Clairvoyant" is definitely part of Garrett --born out of his mind. But it was just a role. A cover story. Nash was most likely helping Garrett in some way. That's why I compare it to a magic act, which actually requires that the assistants take part in the tricks, while the magician (Garrett or Trevor) takes attention away.
Even if Nash is somehow involved, Garrett is the Clairvoyant. Because, as we learn in 'All Hail the King': "once you've inhabited a role for [long enough], it often becomes you and you become it". When Garrett started hitting Ward & asked Ward "who are you?", he said "Grant Ward Agent of Shield" & he was ready to pass that question on the test...His identity had been compromised before, maybe acting runs in his family. I think there are still many lies to get to the bottom of, and Ward changes his name to Eric Williams, aka The Reaper.