Board Thread:Supergirl discussions/@comment-9346948-20161129012248/@comment-3423279-20161201180755

As we have seen from the attempts to injure Supergirl, Flash can't hurt her (and therefore anything on her level) with anything short of maybe vibration powers to phase through their skin and hurt them from the inside.

And I doubt Cisco would care because Barry is also in trouble, therefore, everyone who is allied with him doesn't deserve his help.