I finally read this issue.
I was going to skip it but I'm glad I didn't. One of the best single-issue stories I've read in a while.
The Tarantino/Memento structure of the story was done very well.
Especially if you consider the suspense that just would not have been there if it had been told in chronological order.
The Cluemaster code was a great trick to get the story to fold back in on itself and requires a fresh look at the previous pages. Especially page 1 where Helena glides her hand along the rope (presumably using the acid- which means Dick told her the trick) and with her saying "the roof" (most likely the extraction point).
My interpretation of the issue is that they were on an assassination mission for Spyral and the only way to get close to The Beast was to become heroes in his eye. That led them to getting a medal and brought Dick and Helena within reach of their target.
They knew there would be no way out and capture was imminent.
The only escape would be a fake execution.
I give it 5 out of 5 stars.
Most pre-Grayson fans may think less of it, but I weighed it as a spy/espionage comic instead of a superhero comic.