** SPOILER ALERT **
Plot - Mutack and his shape-shifting Mutoids plan to use the Herculoids' planet to launch a surprise missile attack on their enemies. The Herculoids defend the neutrality of their planet.
Herculoid in trouble - Igoo
The Mutoids cause the ground under Igoo to give way, leaving him hanging precariously over some jagged rocks. Gloop positions himself over the jagged rocks, thereby providing Igoo with a safe landing.
Special artistic mention - Dorno floating barefoot on a lake on Gleep, who is serving as an inner tube
Dishonorable plot mention - Zok cuts a hole in a boulder, picks it up with his tail, intercepts a flying rocket ship, drops the boulder on the rocket with the boulder's hole fitting perfectly around the rocket's nose. This is a good episode with effective villains. Although any real danger to the Herculoids was rather limited, the need to prevent the launch of the Mutoids' missiles at their enemy kept the episode exciting.
Grade - B+