Dreamed I was taking a programming class. The TAs were TV Supergirl and a darker & edgier AU Supergirl who’d mellowed to just being sarcastic, but still had cliche signifiers like a darker costume. Sarcastic SG was showing off her Kryptonian tattoos to explain TCP/IP.
It was also high school student visit day, & one of the prospective students was a villain trying to get close enough to SG to trap her in a time warp. She needed a pre-STAR Labs Cisco to help her get back.