Mona's Secret - S1.E10

Jim and Roy hide the orb, but Dr. Elliott has his sights set on finding it. So when they reveal to the group that ""Einstein knows where it is,"" Elliott's spy leads him to it. Meanwhile, Roy finds a mutual attraction with Mona, so he spends a romantic evening at her house, where he learns that she has a tail... and that she's Elliott's spy. The evening ends with Elliott busting in and taking Roy prisoner.