Pop to the Top Zack and Quack : Season 1 Episode 20
TV-Y Nick Jr.
Aired: April 5th, 2014 @ 12:00 AM EST on Nick Jr.
When Hop and Skip's cousin Flip visits, the friends plan a climbing expedition to Mt Popperest. Hop and Skip are nervous, but when Flip gets stuck, Zack encourages the sisters to overcome their fear and save the day.
