"Beware.. Beware.. Beware the... Blood Brothers!"
Chapter I: "A Taste of Madness"
Chapter II: "Betrayal"
Chapter III: "Trapped on Titan!"
Chapter IV: "A Clash of Titans!"
Chapter V: "Metamorphosis!"
Interlude: "...To Be Free from Control!"
Chapter VI: "A Time for Confrontation!"
Interlude.
Chapter VII: "The Beginning of the End!"
Chapter VIII: "Thanos, the Insane God!"
Epilogue.
Reprints Iron Man (1968) #55, Captain Marvel (1968) #25-34 and Marvel Feature (1971) #12