When trailing Jimmy Olsen as he collects charitable donations around the city, "Labs" Logan figures out that Jimmy summons Superman through his wristwatch. So when Jimmy isn't looking, Labs changes the signal's frequency so that Superman won't come to Jimmy's rescue. But when Labs changes the signal back the proper frequency to lure Superman into a kryptonite trap, Jimmy uses the signal to broadcast Morse code to warn Superman, who nabs the crook long-distance and helps Jimmy deliver the charity collection.
Using a camera that can take pictures in the dark, Jimmy accidentally snaps a photo of Clark changing into Superman. Superman must use trickery to convince Jimmy the photo is a fake.