Outside police headquarters, the Terrific Trio stood huddled around the Batmobile. "So you see, Batgirl," Batman explained, "the riddle we were cogitating was actually a clue to the whereabouts of the real riddles needed to solve his crime."

"That enigmatic egotist has done it again!" exclaimed Robin.

Their brainstorming was interrupted by the sound of the phone ringing from inside the Batmobile.

"Yes, Commissioner?" Batman said, picking up the receiver. Peels of the Riddler's wild laughter crackled through the earpiece.

"Riddler! Where are those submarines, you serial querrier?"

"I ask the questions here, Batman. You answer them – or maybe you won't!"

"You've really done it this time, Riddler" Batman said, scanning the horizon for signs of his foe. "Stealing four submarines at once is a stunt I didn't think even you could pull off, given your usual hooligan staffing level."

"Elementary for a mind like mine, Batman. I merely welded trailer hitches to the front and back of each vessel."

"Of course! It's so simple that it's fiendishly clever!"

"Now riddle me this: Why did the dog run around in circles?"

"Why did the dog..."

"Solve them on your own time - I'm in a hurry. Also, what trembles at each breath of air, but can bear the heaviest burdens? And where do we love to sleep outdoors?"

Batman listened to some hyena-like cackling, followed by a click as the villain hung up on him. "No manners at all," he said, shaking his head. "Well, at least he's given us the clues to his next crime."

"His next crime?" said Robin. "He has enough missiles to conduct World War III! Why is he wasting time with follow-up robberies?"

Batgirl provided the solution. "The Commissioner said that the wake from that caravan of submarines was spotted by a Coast Guard cutter. The cutter tried following, but lost the trail when the subs started changing direction and then submerged to deeper depths. What if the Riddler's haphazard maneuvering near the ocean floor resulted in some kind of damage?"

"Damage that may have curtailed his ability to operate his ill-gotten goods!" Batman said enthusiastically. "He overlooked the First Rule of Safe Vehicle Operation - 'Always..."

"We'd better solve those riddles before you forget them, Batman," Batgirl interrupted.

"I hardly think that's likely, Batgirl. The first riddle was 'why did the dog run in circles'?"

"Because one good turn deserves another!" said Batgirl.

Several teeny-bopping girls were passing by the Batmobile and now stopped to stare.

"Look! It's Robin!" cried one.

Ignoring the distraction, Batman continued. "What trembles at each breath of air, but can bear the heaviest of burdens!"

"Water!" said Robin.

The excited girl gasped in awe. "Do you see how brave he is!"

Robin began turning red. "Aw, gee..."

"Very kind of you to say, Miss," Batman responded on behalf of his protégé. "Now, could you young ladies move along and refrain from touching the Batmobile? Thank you."

"Were there any more riddles?" asked Batgirl.

Batman watched the departing girls warily. "There was one other that I won't go into, but the answer was 'sextant'."

"I've got it!" Robin said. "They all add up to the 'Good Turn Nautical Navigation Supply' store!"

"That's on the other side of town!" said Batgirl. "We'd better hurry!" The three rushed for their respective vehicles.