Adventure Time Season 8 Episode 17 - High Strangeness Episode Title:High Strangeness.Episode Description:It is revealed that Tree Trunks has had alien children with extraterrestrials who visit her every couple of years or so. While attending Princess Bubblegum's launching of a small probe rocket, Tree Trunks' alien friends are hit by the probe and start to become infected by Bubblegum's gumlings. Tree Trunks discovers that Bubblegum has more probes and brings her aboard the aliens' ship to show what they have been doing. Bubblegum apologizes and retrieves the gumlings, revealing that she wanted to colonize other planets. The aliens agree to take her probe to an uninhabited planet.