|In Too Deep|
|Air date||June 11, 2012|
|Written by||Terri Hughes Burton & Ron Milbauer|
|Directed by||Colin Ferguson|
| Preceded by|
| Followed by|
|Cast | Transcript|
As Carter tries to find out why Allison won't set a date for the wedding, Jo tries to keep the pranks under control. Allison and Carter become trapped in a leaky sub at the bottom of a lake. Carter and Allison get in a big fight but soon Allison and Carter ask Henry to marry them now before they are teleported to GD, with Jo as the maid of honor. Holly's programming is too much for Sarah's computer to handle and Holly starts to fade away. Zane is put in charge of Section 5. Zane sets to work on a computer big enough to save Holly's programming.
- As well as the literal aquatic scenario, the title may be a reference to the Genesis song of the same name.