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NEW YORK (TheStreet) -- Did you miss last night's "Mad Money" on CNBC? If so, here are Jim Cramer's top takeaways for today's trading.

HRS Chart
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Harris (HRS): With the news that Harris is buying Excelis (XLS), Cramer said the combined company is a buy, buy, buy because it now has the potential to become a top 10 defense contractor.

Harris is already a strong defense contractor providing secure communications and encryption systems for government and military use. Adding Excelis to the mix means the combined company will be able to offer night vision and radar reconnaissance products, all while saving an estimated $120 million a year.

The new Harris will have tons of room to grow overseas, Cramer said. Shares currently trade at just 15 times earnings, a discount to its peers.

LULU Chart
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Lululemon Athletica (LULU - Get Report): Cramer said Lulu is back and better than ever. After a series of missteps in 2013 that cut the stock by more than half, Cramer now thinks this growth retailer has its mojo back and is positioned to surprise Wall Street.

Shares of Lulu are already up 16% so far in 2015, thanks to its most recent 5-cents-a-share earnings beat with an 8% rise in same-store sales. Cramer said $80 a share is not out of reach for Lulu because there is a lack of quality growth retailers for money managers to choose from. The company's strong quarter could've been even stronger without the West Coast port strike. Cramer sees Lulu raising its forecasts later in the year.

TSLA Chart
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Tesla Motors (TSLA - Get Report), (AMZN - Get Report) and Netflix (NFLX - Get Report): Where would Cramer invest new money in the market? He said the cult stocks of Tesla, Amazon and Netflix may be tempting, but he'd rather stick with companies that offer more traditional valuation models. He suggested sticking with his "four horsemen" of biotech or semiconductors or even Schlumberger (SLB - Get Report) in the oil patch now that oil prices have begun to stabilize.

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-- Written by Scott Rutt in Washington, D.C.

At the time of publication, Cramer's Action Alerts PLUS had a position in LULU and SLB.