Season
Season 1 Episode
- Season 1 Lab Friends... Forever?
- Season 1 Surviving Billy
- Season 1 Calzones
- Season 1 Crab Hands
- Season 1 The Date
- Season 1 The Troggies Next Door
- Season 1 The Mushroom Prince
- Season 1 Count Wretcher
- Season 1 Hey Judy
- Season 1 Welcome to the Hag House
- Season 1 Beastie Billy
- Season 1 Zartran
- Season 1 "K" is for Klutz
- Season 1 Tommy X
- Season 1 Billy/Willie
- Season 1 The Telltale Wart
- Season 1 Ol' MacBilly
- Season 1 Silly Spheres
- Season 1 Wretcherous Treachery
- Season 1 Jared
- Season 1 Sluggy
- Season 1 Double Bubble
- Season 1 The Glorp of the Gorks
- Season 1 Rat's Entertainment!
- Season 1 The Battle for Subterranea-Tania
Billy Dilley’s Super-Duper Subterranean Summer
6.50 48 minutes The adventures of science-obsessed Billy Dilley and his lab partners Zeke and Marsha
