Should I watch arrow before Flash?
The crossover between Arrow and The Flash was officially the very first of the Arrowverse and laid the groundwork for future crossovers. ... It's our recommendation that you
watch the first seven episodes of Arrow, and then the first seven episodes of Flash before watching the crossover.
Does the flash appear in Supergirl?
"Worlds Finest" is the eighteenth episode in the first season of the CBS television series Supergirl, which aired on Ma. ... The episode reunites Melissa Benoist with her former Glee recurring co-star Grant Gustin, who portrays the Flash.
Can I watch supergirl without watching arrow?
No u need to follow flash and arrow. But u need to know the basic plot of legends of tomorrow. Watching supergirl is waste of time.