Will the Circle Be Unbroken? - S3-E22
Corrected entry: Spencer asks E. Lamb questions about the employee IDs at Radley throughout the episode. In response to one he says he has worked there since he left the Navy, implying it's been a long time. In the previous episodes we find out that Toby used the alias E. Lamb to get in and out of Radley. Since the real Eddie Lamb has worked there for a significant amount of time it doesn't make much sense that the Radley employees wouldn't notice an entirely different person using the ID, or that they wouldn't question a visitor with the same name as an employee.
Correction: Who says anyone who worked with E Lamb still works at Radley? They could all be new employees who never met him.
THGhost