H.I. No. 21: Cave Troll in Your Pocket

"Cave Troll in Your Pocket"
	Hello Internet episode
Episode no.	20
Presented by	CGP Grey; Brady Haran;
Original release date	September 20, 2014
Running time	2:09:56
Episode chronology
← Previous; "Reverse Finger Trap"	Next →; "16-hour Search for Wallpaper"

"H.I. #20: Reverse Finger Trap" is the 21st episode of Hello Internet, released on September 8, 2014. It is the first episode of the podcast's third season.