There's more than enough evidence in "No Immunity For The Diplomat" to prove that Harley knows the connection between Conan and Jimmy. If that's the case, why does he finally make the connection in this episode, after not having a clue in Part 1?
Harley: Amazing! He's right on the mark! This kid's not just playing detective, he's making brilliant deductions. The only person I ever know who can think like that is Jimmy Kudo. Kudo! Yes, of course! Now that I think about it, when Kudo suddenly showed up during the last case, I'm pretty sure this kid was missing and when Kudo disappeared again, the kid just popped out of nowhere. Could this boy be Jimmy Kudo?
Harley: So the poison didn't kill you, it shrunk you, and now you're freeloading off Old Man Moore so you can hang out with the girl you love while you look for the men in black. Conan: I don't love Rachael. We're just friends. She's a typical woman, way too complicated. Rachael: Hey, guys, I'm glad you're having so much fun together. Conan: Yeah! Harley: Hey, Rachael, I was talking to Kudo earlier and you'll never guess what he said about you. He's so lame. He said he couldn't figure you out, that you're way too complicated for him. Rachael: Man, what a jerk! Harley: (to Conan) Yeah, you got that right. That was for knocking me out with a tranquilizer, Kudo.
Harley: Hey, you're Kudo, aren't you? Conan: What? No, I'm just a kid. Maybe when I grow up, I'll be like Jimmy. Harley: Don't give me that little kid crap, Kudo. I know it's you. (grabs the Voice-Changing Bow) Hey, fancy gadget! So this is how you mimic my voice, huh? I was watching you out of the corner of my eye the entire time. Conan: I ordered it in the mail! Harley: You're not gonna give up, are you, Kudo? Well, I'm not either! I can't explain the body, but the way you talk, your logic, your deductions, it's Kudo. There's no doubt about it! Conan: But I'm just a little kid! I'm not Jimmy Kudo! Harley: (sarcastically) Okay, whatever you say. Rachel, I just had the most interesting chat with little Conan. Now, bear with me. I know this is going to sound shocking, but Conan's... Conan: HARLEY, NO, WAIT!! YOU WIN!!
Hint: Holmes Test
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