Where's the intruder?

He's wondering where his is :-)

And he looks a bit nervous!

He's orange.

When I tilt my head, Snooker, my brain is running out of my ears. Too much brain in too little space :-)
@ Callas: Right on :-)

Left corner in the top

Thought you'd get the comments SL but guess they're too confusing for you. :)

@ Blackberrymuffin: Well, they should notice him / it :-) He's clearly visible. The only unedible M&M...

@ Pkin: no thanks...ewwww, losing my appetite...
@ Snooker: Indeed, there's an intruder, hence the title of this puzzle :-)

They're not going to notice the intruder, I don't think.

There is an intruder in their midst, isn't there?

I ate them. Do you want me to barf them up and put them back. It would be quite a mess.

There gone? Where is there?

No there gone. That was breakfast.

Good for you. He wasn't that hard to spot. But it seems like there are several M&M's missing. You better put them back.

Hee hee found him