Did you miss "Mad Money" on CNBC? If so, here are some of Jim Cramer's top takeaways.

It hasn't always been easy to own the cruise stocks, but right now, it's never been better. That was Cramer's assessment after the remarkable runs in Royal Caribbean Cruises Ltd. (RCL) , Carnival Corp. (CCL) and Norwegian Cruise Line Holdings Inc. (NCLH) .

Cramer said after crude oil cratered in 2014, it should have been smooth sailing for the cruise lines, but that was tempered by a scare related to the Ebola virus that worried passengers and investors alike. The industry quickly bounced back, however, and 2014 and 2015 were stellar years for the cruise stocks. In 2016 though, the Zika virus was making headlines and once again depressed the group, even though those fears were overblown.

More recently however, Cramer said the analysts just got it wrong, expecting other areas of travel and leisure to benefit more from Trump's tax cuts and infrastructure plans. When those plans stalled, so too did the rest of travel... except for the cruise stocks, which just kept on sailing.

Cramer noted that the group sells at 13 to 15 times earnings, less than the S&P 500 overall at 18 times earnings. And that's using the current estimates, which are likely too low. With so many secular trends pulling in their favor, Cramer said the cruise stocks are still the place to be.

On Real Money, Cramer says investors need to remember that in the dog days of summer, things can happen at lightning speed. Get his insights with a free trial subscription to Real Money.

Cramer and the AAP team are updating their bullpen -- the stocks they are following for new opportunities during the second half of the year, including 3M (MMM) , AT&T (T) and Visa (V) . Find out what they're telling their investment club members now and get in on the conversation with a free trial subscription to Action Alerts PLUS.

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At the time of publication, Cramer's Action Alerts PLUS had no position in stocks mentioned.

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