The episode is called Tempus, Anyone?

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And would it be safe to say that other than Perry and James and Lana, no one else really met our Lois during her brief stay in that dimension?
I think so, yeah

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And would it be safe to assume that her visit there was but a day?
Well, she was there overnight, when she made up a Superman costume, but it might have only been 24 hours overall.

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And what exactly is James's job? Perry is running for mayor and James is pushing his campaign, but what is his job at the Planet...wait, a bell is ringing...is he the paper's owner?
Yep. I think they said something about him being a software genius -- made his first million in computers, then wanted to try owning a newspaper, or something.

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Other than Perry did anyone 'recognize' Lois from before?
Not that we saw.

PJ

"You told me you weren't like other men," she said, shaking her head at him when the storm of laughter had passed.
He grinned at her - a goofy, Clark Kent kind of a grin. "I have a gift for understatement."
"You can say that again," she told him.
"I have a...."
"Oh, shut up."

--Stardust, Caroline K