When Henry receives a series of mysterious notes from someone, he begins to worry that the sender may know his secret identity.

Captain Man, Kid Danger & Phoebe Thunderman infiltrate a secret villain meeting in Swellview where the villains plan to destroy Captain Man and Kid Danger. At the meeting Phoebe discovers an unexpected attendee, her brother Max.

At Henry's house, Henry, Piper and Jasper want to watch Dog Judge. When Henry asks Jasper to use the remote, Jasper refuses and uses his phone but it's a long process. Henry and Piper get a tv and turn it on. They start watching Dog Judge but Jake arrives for a family meeting. Siren was in Detroit. Jake says that his step-brother Mark is in town and he is coming for a family dinner. Henry and Piper are grossed out by Mark's hair neck. Jake wants Henry and Piper to respect Mark while he is in town.

When Piper gets a mysterious illness, Captain Man must travel back in time to the 1700s to find the only cure.

When Ray starts behaving strangely, Henry and Charlotte investigate and are surprised to discover what's been causing it.

Henry and Charlotte travel to an opposite universe where evil counterparts of Ray and Schwoz want to destroy Piper.

When a video of Henry and Ray transforming into Kid Danger and Captain Man gets out, Henry must go to great lengths to get it back so that his secret identity isn't revealed. Henry must deny to all of his friends and family

When Henry gets an unexpected side-effect from going through the Densiziter, he must hide the side-effect from his family at dinner while the gang works to help Henry return to his normal self.

When Kid Danger is almost badly injured on a mission, Henry decides to go through the Densitizer and become indestructible like Captain Man. But things don't turn out quite the way Henry hopes they will.

When Captain Man gets arrested for committing a petty crime, he is forced to spend Christmas in jail.

After Jasper is lauded for being a local hero, Henry becomes jealous that Kid Danger is the one getting all the thanks.

Henry decides to bring his boss to Swellview's most exclusive restaurant.

When Kid Danger and Captain Man battle the Time Bandit, Kid Danger accidentally falls into the Time Bandit's time machine and relives the same day over again.

Ray goes out of town to attend a wedding and leaves Henry and Charlotte to safeguard Swellview, but trouble occurs.

When Piper's basketball coach quits, Henry becomes the coach of Piper's team; Henry is challenged by the League Board and its unorthodox rules.

Henry's plans for the school dance become complicated when he must also appear as Kid Danger; Kid Danger is forced to make a dramatic decision.

While trying to capture The Mad Granny, an old grandmother who keeps terrorizing Captain Man at public appearances, Henry is forced to juggling his work life and his romantic life.

Henry finds himself in danger when he realizes Dr. Minyak has transformed Charlotte into a super strong being set to capture Kid Danger and Captain Man. Or be captured by Dr. Minyak.