Synopsis for "Fugitive in Manhattan!"
Arriving in New York where Professor Hawkins can study Godzilla, the creature's cage is accidentally dropped and Godzilla gets loose, ending up in New York's sewer system. With the amount of time that Pym's shrinking gas will last in question, it's a race against time as everyone fans out to try to find the creature before it returns to its normal size and rampages through the city.

While in the sewers, Godzilla comes face to face with a New York City sewer rat and easily kills the beast. Emerging from the sewers, the creature stumbles upon Rob who had snuck out of the helicarrier himself to find Godzilla to be sure nobody hurts the monster. As the boy is reunited with the monster, it suddenly grows in size to be on par in height with a human adult. 

Notes
Letters (story pages): Saladino (uncredited) page 1, Albers (credited as Diane Albers) pages 2-17.