A man named Sylvester Pemberton tracks down Chloe and tells her he knows about her team of superheroes and needs their help. However, before he can explain who he is, he is attacked and killed by Icicle (guest star WESLEY MACINNES). Clark and Chloe?s investigation leads Clark to the former headquarters of the Justice Society of America where he meets up with Nelson AKA Dr. Fate (guest star BRENT STAIT), Carter Hall AKA Hawkman (guest star MICHAEL SHANKS) and Courtney AKA Star Girl (guest star BRITT IRVIN). Courtney pleads with Hawkman and Dr. Fate to help her catch the killer that is targeting their group, but they are reluctant to resume their duties as superheroes. Clark, John Jones (guest star PHIL MORRIS), Green Arrow and Chloe team up to help the JSA stop Icicle before he murders another member of the group. Meanwhile, Lois receives a package from a mysterious agency called Checkmate, run by Amanda Waller (guest star PAM GRIER).