Jacqueline "Jack" Flash was the internet sensation of the PRIME SUMMER PROGRAM, with a cult following of fans sometimes referring to themselves as the Jack Pack and sometimes as the Flash Mob. Jack herself almost never called them that, as she considered it kind of tacky. Jack helped defeat the Antediluvian, both befriended and had a lot of friction with the rest of the team—especially Joule and Vector, and had to deal with her very annoying internet celebrity rival, Kyle Blake, aka K-Train. In the end, Jack managed to overcome her distaste for Kyle long enough to work with Eclipse to save Kyle, defeat the Antediluvian for good (?), but it remains to be seen whether she can deal with her greatest challenge: her mother and overweaning publicist, Patsy Flash.