IRON MAN (1968) #318, [Very Fine (8.0)]

Tragedy strikes at California's Polytech Institute as Tony Stark's college mentor is caught in the middle of an industrial accident! And much to the golden avenger's chagrin, Dr. Ted Slaght has been transformed into the villainous Slag! Iron Man wants desperately to save his Alzheimer's-stricken friend, but sadly that doesn't seem possible. Once the climactic battle is over, Tony retreats to his new clandestine Arctic bunker. What is he doing up there? Cameo appearances by Bethany Cabe, Happy Hogan, Abe Zimmer, Dr. Erica Sondheim, and Mrs. Arbogast.