This live blog recaps the highlights of “The Flash” Season 3, Episode 1 (Flash 301) a.k.a. Flashpoint, which aired Oct. 4 on The CW. Fans have waited for months to see what happens next. This third season premiere was developed by showrunners Greg Berlanti and Andrew Kreisberg, and directed by Jesse Warn. Okay, here we go. Last we saw Barry Allen (Grant Gustin), …