'The Flash' Season 3, Episode 8 Spoilers: Supergirl Thinks Green Arrow Doesn't Like Her In New 'Invasion!' Sneak Peek

Kara (Melissa Benoist) feels that Oliver (Stephen Amell) is being cold to her when Barry (Grant Gustin) personally introduces them to one another in a sneak peak for tonight's Season 3, episode 8 of "The Flash."