I was out of town and off-line when this episode came out, so I'm just going to throw in my two cents on several topics:
Coffee: When I lived in Mexico I was able to buy Columbian coffee, roasted in Italy, and imported via the U.S. This was superb coffee. Being recently roasted is not nearly as important as being freshly ground. This coffee took weeks from the roaster in Italy to the coffee shop, and was excellent if freshly ground. In contrast, coffee that was ground a week ago is mediocre even if it was roasted the day before it was ground. People give too much importance to coffee being recently roasted.
Mars: They never explained how the scientists proposed to give Mars a magnetic field. Since the proposal seems far-fetched to me, I want to know how they intended to accomplish it. The Earth gets its magnetic fiend from its molten iron core. I think it unlikely they can create a molten iron core for Mars.
Heavy rockets: One of the rogues (I cannot tell Evan, Jay, and Bob apart) asserted that the Saturn 5 was "better" than modern rockets, because it can lift more. I'd argue that a "better" definition of "better" would be the cost per kilogram of payload. The Saturn 5 could lift more weight than the Falcon Heavy, but the Falcon Heavy does it at a much lower cost per kilogram. Any deep space program will require many launches. It's no big deal if the rockets are smaller. All that matters is the total cost of the program. Falcon is far better than Saturn 5 because for the same money we can put more stuff up there.
And a linguistic nitpick: Bob (I know it was him only because one of the others addressed him by name during the segment) kept saying that the researchers had "proved" that they had produced a supersolid by this or that means. A better choice of words would be that they had "demonstrated" or "found evidence" that they had a supersolid. "Proved" sounds too much like the language of pseudoscience advocates.