Yesterday's Gone (S03E12)

After all the near misses and cover ups to keep Mike's secret safe, his worst fears have finally been realized: Louis knows. And now he's invited the infamous Professor Henry Gerard to Pearson Specter to out Mike for the fraud that he is. Realizing it will take more than Donna's smooth talk to get them out of this one, Harvey tells Mike to sit tight while he brings the situation to Jessica's attention. (USA Network)