"One Giant Leap" is the third episode of the fifth series and the seventieth episode overall of The Dumping Ground. It premiered on 27 January 2017.
Ryan overhears that Mike and May-Li are planning to kick him out, so he comes up with a plan to get someone else out of the house. Meanwhile, Joseph finds out that the moon landings were faked and is desperate to see the moon.
- Connor Byrne as Mike Milligan
- Stacey Liu as May-Li Wang
- Lewis Hamilton as Ryan Reeves
- Yousef Naseer as Joseph Stubbs
- Hannah Moncur as Chloe Reeves
- Annabelle Davis as Sasha Bellman
- Ruben Reuter as Finn McLaine
- Kia Pegg as Jody Jackson
- Sarah Rayson as Floss Guppy
- Akuc Bol as Kazima Tako
- Miles Butler-Hughton as Tyler Lewis
- Alexander Aze as Dexter Bellman
- Nelly Current as Toni Trent
- Gwen Current as Billie Trent
- Jethro Baliba as Archie Able
- Nigel Planer as Edwin Von Trockelbomf III
- Ryan was originally planned to go on a trip, but he later gives the opportunity to Joseph.
- Joseph and Finn now have a month of punishment (washing the pots).
- Ryan and Chloe's friendship is strained yet again.
- The events of "The End of It All" were mentioned in this episode.
- The title of this episode is a reference to the speech that was made by Neil Armstrong when he landed on the moon.
- "One small step for man, a giant leap for man kind".
- In the credits, Edwin Von Trockelbomf III is credited as "Professor" even though his name was mentioned multiple times during the episode.