Because she is a figment of Oliver's drugged imagination.

That assumes we are on the same Earth as Team Flash.

Isn't that Barry helplessly watching Iris die?

How dare they do this before the 31st!

That is the best way to enjoy a Blenheim's!

I live in Harlem near where the exterior shots of Pop's were filmed. Something, I assume The Defenders, must be filming soon as the facade for Pop's has been rebuilt in the last few days.

The Doctor would be a terrible addition to the Arrowverse. Time Lords don't take kindly to time meddlers and he would quickly shut down the Legends, or at least destroy the Waverider. He would also disapprove of Oliver's vigilante ways and would turn the Green Arrow into a fool that nobody would take seriously.

Paragraphs!

Or maybe they could pay a visit to Sara's mother once Rip Hunter returns.

In the small world department, Katie Cassidy's first roomie in Vancouver was Danielle Panabaker.

Sure, but Cisco is likely to be back to his old self before the season is out.

The second crossover is the musical, right?

He didn't. It was a coincidence that the two things had the same name.

Caitlin isn't evil. Over several episodes they have shown her becoming more fearful about what she might become. She is scared, confused and acting irrationally, but she is not evil.

I was surprised by the lack of a lead-up to the crossover.

It's not that her powers have made her evil, it's that she is afraid of those powers and getting them is making her act irrationally.

Or Prometheus recruited her after learning that Oliver is the Green Arrow.

Despite Queen Consolidated going under and losing the estate Oliver and Thea are probably still quite wealthy. Malcolm may have also given Thea some of his fortune. The Queens may not be billionaires anymore but I'd guess their net worth is easily in the tens of millions.

This episode was better than the grade implies.

You refer to yourself in the third person???