This walkthrough shows you how to solve the first puzzle (Case 1: Show’s Over) in Murder by Numbers
Show’s Over Walkthrough (First Puzzle)
Take a look at this column. The 1′ clue means that only one square in this column should be filled in.
Because one square is already filled, that means none of the others can be. So, we should mark these squares with a cross to remind us that they shouldn’t be filled in.
Mark these four squares with X’s now:

Because one square is already filled, that means none of the others can be. So, we should mark these squares with a cross to remind us that they shouldn’t be filled in.
Mark these four squares with X’s now:

Now, do the same for 2 and 5 column:

Because we put in those Xs earlier, there’s now only one place where this other square can go! Fill it in now and row:

And it is done If you do like that:
