A battery is stolen by a criminal calling himself the Mirror Master. He soon steals a crystal from Star Labs. Tina will get fired if they can't recover the crystal. Tina's mother comes for a visit, and an old friend of Barry's also stirs up trouble.
- This episode introduces the first live action adaptation of Mirror Master.
- David Cassidy who portrays Sam Scudder is also the father of Katie Cassidy.
Mirror Master kidnaps Tina's mother