Episode Title:
Time Flies / Prank Calls.
Episode Description:
Time Flies: While spying on Simon in the basement working on what appears to be a time machine, Alvin and Brittany are convinced that Simon accidentally sent himself back in time, and keep trying to go back to retrieve him, only to discover that it is actually a photo machine that superimposes the subjects into different time periods; meanwhile, Simon is actually out in search of a replacement part for his machine, one that no camera shop in town seems to carry.
Prank Calls: Kevin and Cheesy keep making prank phone calls, so the Chipmunks trace the number and attempt to prank them back, only to accidentally dial the wrong number, and get a scary-sounding man who vows to track them down and "make them pay". The Chipmunks soon discover a former secret agent has, indeed, tracked them down, and proceeds to chase them throughout the neighborhood. After many failed attempts to lose him, they are cornered in their own home and come to learn that the agent meant what he said: he makes the boys pay his phone bill for the amount of phone time they wasted with their prank call. Squaring everything away, the agent agrees to teach Kevin and Cheesy a lesson by calling them back and making the same threat of finding them and making them pay.
