This issue is almost entirely a reprint of Detective 408, but issue 477 (May/June 1978) does have a few new pages at the beginning and ending. There may not be much material by Englehart, Rogers and Austin, but what there is is important.
Batman and Gordon go to see Boss Thorne, now in an asylum. He tells them of Hugo Strange’s murder, and being haunted by his ghost. Batman puzzles, if Strange is truly dead, who left him the gas meter?
The final page has a wonderfully creepy murder, an introduction to the new Clayface, whose story will be told over the next two issues.