The Challengers of the Unknown guest-star as they embark on an adventure through time to enlist Superman's help in defeating a dangerous criminal from the past. Plus, the tragedy of Adam Grant's death sinks in at the boy's funeral.
D.C. Johnson, Mark Waid, Karl Kesel, James M. Faerber, Chuck Dixon, Tom Peyer, Todd DeZago, Peter David, Todd Nauck, Humberto Ramos, Michael McKone, Craig Rousseau, Cully Hamner, Joe Phillips, Ethan Van Sciver, Amanda Conner, Marty Egeland & Angel Unzueta
