Detective Comics#500, perfect day to post with Batman's 80th anniversary today and #1000 coming out this week. Phantom Stranger gives Earth-1 Batman a chance to find out if Bruce Wayne can become Batman without his parents being murdered. Robin is brought in to aide the Earth-5 adventure.
Underrated classic. Sure a little sci-fi, a little cheese, but really good stuff.
Here is a synopsis of all of the stories in the anniversary issue.
https://comicvine.gamespot.com/detec...y/4000-106613/