2 weekends ago, this wasn't an incredibly close call and actually the end was very amusing. Was coming into MKC to land, was just inside class D and obviously in contact with Tower. I get a "Cherokee 46F I'm showing an aircraft at your 3 o'clock, 2,500 and less than a mile, type unknown, I'm not talking to him." At the time I was descending through 2,700. I look off my right and see him immediately, report traffic in sight.
Couple seconds pass "Downtown Tower, this is Cessna 1234A, I think I'm the one you're talking about, I'm over Worlds of Fun at 2,500 inbound for touch and goes." Tower tells him of my position and he comes back with "negative contact". All the while he's creeping ever closer as I'm headed east/southeast and he's more south/southeast so we're on converging courses.
Then "Tower I've got that Cherokee traffic in sight."
"Cessna 34A roger, you are #2 to land Runway 21 behind the Cherokee, execute s-turns for spacing."
I'm cleared to land, he's s-turning away and FINALLY getting some distance behind me. Tower reports to him that "Cherokee traffic is on short final, you are cleared to land."
Then the kicker: "OH! Tower, I guess I had a visual on the wrong aircraft, I was looking at the blimp."
DOH. Nice to know all that time he wasn't actually looking at ME.