"The Death of the Sentry"
Reed Richards completes the telling of the bedtime story to Franklin, though, as Sue protests, it is not a story that makes for good dreams.
The Golden Age Sentry tackles an acid spewing monster that corrodes his mask right off of his face in front of the news cameras. Thus, the world, including Lindy Lee, find out that the Sentry and Robert Reynolds are the same person. This adjustment is a difficult one, but to compound it, the Void and Cranio have teamed up, and seem to have the secret of how to drain and reuse the Sentry's substantial powers. After a near death experience, the Sentry goes after the super-villain team, but Cranio has discovered the startling nature of Sentry's existence, and tells it to the Sentry just as the Void finishes the job he started, draining the last of the Sentry's essence, killing him, and, in essence, becoming the Sentry, and no one is the wiser.
Reed assures Franklin that it's just a bed-time story, but the Sentry hovers mysteriously just outside the windows of the Baxter Building.