In the next coming episode of The Flash, Katie Sackhoff (Battlestar Galactica) will be heading to Central City, as she will be facing her former employer. Also, Felicity Smoak (Emily Bett Rickards) will arrive to celebrate with Iris bachelorette party, as things gone weird when Killer Frost (Danielle Panabaker) suddenly showed up. Barry and the guys will also attend another bachelor party, which might be turning out stupidly funny. See the preview images of The Flash next week episode below.
Source: Flash TV News