I think if Rikki is able to let it go (I still don't think Danny was to blame though. I just think he should have checked on Ruben as soon as he called in the robbery), that Danny should at least try to let it go. If Rikki truly thought it was Danny's fault, she would have shot him in his own apartment with his own gun but it doesn't appear she holds him responsible at all. They almost all do it. Stella went to Mac about getting that equipment so she could get her HIV results faster and he did it. He even had Adam run the test. I agree, it would have been a totally different episode and it wouldn't have been as good. I also think Mac would have used lab resources to help Danny but I don't think he would have let Danny take Rikki home. I think Mac would have insisted they take her in right then.