‘The Flash’ Season 3 Spoilers: New Image Teasers Released; See The Newest, Biggest Threat To CSI

"The Flash" Season 3 new image teasers revealed "Harry Potter's" Tom Felton who will join the series cast members as Julian Albert. The synopsis of "The Flash" Season 3 suggests that Julian will not like Barry Allen, the character portrayed by Grant Gustin, at their first meeting which surprises Barry. Moreover, Julian is also suggested to be a huge threat to CSI.

The new images released by CW showed Felton with Gustin in the CSI workstation. His immediate disdain for Barry seems to imply that he knows Barry prior to their meeting. However, CW still has not revealed specific details on how the character of Felton will progress in "The Flash" Season 3.

Interestingly, "The Flash" Executive Producer Todd Helbing already revealed that Julian is the "biggest threat in the CSI world," TV Line reported. Helbing, however, did not mention whether Julian would turn out to be a threat to Barry and the city as well.

Meanwhile, in an interview with Felton, he discussed that his relationship with Gustin in "The Flash" Season 3 is initially a "love/hate thing," SciFiNow reported. "He's not familiar with me, but I'm familiar with him, so it's an odd dynamic," Felton said.

Additionally, the actor was also asked whether his character in "The Flash" Season 3 would be in contrary to his previous portrayals in "Harry Potter" and "Rise of the Planet Apes," to which he answered, "Absolutely not." "I would hope the opposite," Felton added.

"The Flash" Season 3 is slated to air on Oct. 4 on The CW. The premiere episode entitled "Flashpoint" is expected to pick up Barry as a normal guy with both of his parents alive. While Barry is enjoying his new life, he is aware that there would be deep and serious repercussions of continuing his life that way. So, it remains to be seen if Barry would decide to stay in his new timeline or go back to his real world as "The Flash."

See an extended trailer of CW's "The Flash" Season 3 below.