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

AGN Chart AGN data by YCharts

Allergan (AGN - Get Report) : In an exclusive interview, Cramer sat down with Brent Saunders, president and CEO of Allergan, to discuss the company's merger with Pfizer (PFE - Get Report) . Allergan is currently an Action Alerts PLUS holding.

Saunders called the deal a great opportunity for shareholders, bolting Allergan's pharmaceutical engine onto Pfizer's global distribution chassis. He said the combined company will be a powerhouse with products in all of the top-growing markets.

Saunders said the combined company will continue to have strong cash flows and remains committed to its dividend. That's why Saunders said he's personally "all in" on the deal and is not selling any of his stock.

Cramer agreed, calling the merger a good one for shareholders.

SIG Chart SIG data by YCharts

Signet Jewelers (SIG - Get Report) versus Tiffany (TIF - Get Report) : What's going on in the jewelry business? Back in October Cramer recommended Signet, but last week the stock sank 4% on a surprisingly weak quarter while rival Tiffany saw its shares rise 4% despite missing its forecasts, again.

Cramer said he was wrong in recommending Signet at $147 a share. The company had been a stellar performer, but its acquisition of Jared hit some stumbling blocks that derailed the quarter.

However, with shares now trading at $131, down near 19 times earnings, Cramer said Signet is an even better story than it was in October, especially with the integration issues behind it, he hopes.

As for Tiffany, Cramer said this company has become terrible at being able to forecast its business. The company promised, and failed, to deliver last holiday season and is once again predicting good things this season. But with shares trading at 20 times earnings, Cramer said Signet still represents the better buy.

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