After Henry almost gets hurt in a mission, he discovers that Ray still has the machine that made him indestructible. Against Ray's wishes, Henry asks Schwoz to make him indestructible too, even though it may cause some side effects.moreless
The team investigates when two sons are the prime suspects in their parents' murder. Aunt Deb shocks McGarrett when she returns for a visit with a new fiancé.
Rusty finally takes the stand to testify against Philip Stroh. At the same time the team does everything they can to catch the man who sent Rusty those threatening letters.
Carly gets sick and transmits her illness to a member of the British pop group One Direction. Elsewhere, Spencer must coach a young girl who hates exercising.
Carly finds herself in the middle of all of Sam and Freddie's arguments as a new couple. Meanwhile, Gibby use's the moments Sam and Freddie are not around to get closer to Carly, using a puppy.moreless
Three days after the lock-in at Ridgeway, Carly and Freddie find out that Sam put herself in the Troubled Waters Mental Hospital, for thinking she has lost her mind when she fell for Freddie. Carly, Gibby, Freddie, and Spencer try to break her out.moreless
Carly and her pals work on completing assignments during a "lock-in" at their school. Carly and Freddie think that Sam has a new crush and assume the lucky guy is their intern, Brad. Freddie then uses his Mood Reader app, which confirms that Sam is in love but doesn't specify with whom.moreless
The iCarly gang and Spencer try to prove there's a Bigfoot creature, the legendary apelike figure claimed to have been seen by thousands out there, after Carly's teacher gives her an F on a paper because she wrote about Bigfoot and also after new footage of the creature is verified by an expert on iCarly.moreless