Venables "borrows" Jennings' bike. Jennings retrieves it while Venables is in a café, so Venables comes out to find the bike missing. He assumes someone stole it and reports it to the policeman. The policeman sees Jennings riding the bike, assumes he's a thief, and stops him to question him. Hilarity Ensues as Jennings attempts to prove it's his own bike, hindered by a mix-up with school caps.
Jennings' Little Hut
An attempt to give a goldfish some exercise leads to the goldfish escaping in the school swimming pool. Jennings and Darbishire try to get the goldfish out by throwing fish food into the pool, and in the process they knock a potted plant in too. The goldfish stays in the pool. Then Mr. Wilkins decides to have a swim. He can't believe his eyes when he sees a fish swim past him.
Jennings and Darbishire accidentally break a pane of glass in the headmaster's garden. They try to replace it without anyone noticing. Mr. Carter notices, and asks why they're carrying glass around the school.
Jennings and Darbishire
Darbishire says "insanitary spectre" instead of "sanitary inspector". Jennings wonders why he's talking about unhygienic ghosts.
Jennings hides a parcel of fish in Mr. Wilkins' chimney. He and Darbishire later try to get it back... from the roof, with a fishing rod. Mr. Wilkins and the Headmaster are in the room below, and they see the fish-hook in the fireplace. Then Jennings tries the next chimney, which is actually Matron's. He accidentally speaks down the chimney, and his disembodied voice gives Matron a fright.
Jennings' Diary
Jennings comes up with a code: putting his classmates' names back-to-front. It works well enough for names like "Venables" (which becomes "Selbanev"), but it doesn't work too well with his own name ("Sgninnej"). And when he shows Mr. Carter a sample of his backwards writing...
Mr. Carter: It sounds as if you were playing against the Moscow Dynamos.
Jennings discovers what he thinks is a Roman wheel and tries to add it to their museum. The resulting chaos must be read to be believed. Especially when the wheel gets jammed going up the stairs, and Mr. Wilkins' attempts to get it free send it rolling down the stairs.
According to Jennings
Jennings and Darbishire think they've locked some of their friends in the library. They've actually locked General Merridew in. Then Darbishire takes the key, and Jennings has to find him before they can unlock the door. Mr. Wilkins and Mr. Carter try to climb through the window to get the general out, but by then Darbishire has brought the key and the general is already free. This reminds Merridew of a prank he once played when he was a boy, so he decides to reenact it and ties the door handle to a bell... unaware that the teachers are trying to get the door open.
Mr. Wilkins is leaving for a few days. Jennings misunderstands and thinks he's leaving permanently. So all the boys are on their best behaviour around Mr. Wilkins. He thinks they must be planning something.
Mr. Wilkins: If anyone else goes out of his way to be pleasant, there's going to be trouble.
Mr. Carter: You can't discourage politeness and good manners.
Mr. Wilkins: Well, you know what I mean. I shall watch those boys pretty closely for the next few days. And if I find any more disgraceful exhibitions of — of extremely courteous conduct, I'll — I'll — well, they'd better look out!
Jennings, as Usual
Jennings sees a mysterious figure climbing through a window late at night. He tells the Headmaster, who gets the teachers to search the school. Then it turns out the figure was Mr. Wilkins, who'd been locked out by accident.
Mr. Wilkins moves into the room next to the music room. Naturally, he can hear the boys practicing in the music room, and if he hears them stop too soon he knocks on the wall. Jennings has an idea to leave the music room without him knowing: using a record to make it sound like he's still playing. Mr. Wilkins is amazed at how good Jennings' playing has become. Then the record gets stuck...
The Trouble With Jennings
An attempt at a midnight feast goes badly wrong. It leads to Jennings reenacting the sleepwalking scene from Macbeth, and an unexpected fire drill.
Darbishire can't remember if "R.I.P." or "R.S.V.P." goes at the end of invitations. So he decides to use both.
Jennings in Particular
Jennings gets stuck in a sleeping bag. Mr. Wilkins, unaware of his predicament, orders him and Darbishire to come to the staff room. So Jennings has to hop to the staff room, still stuck in the sleeping bag. Mr. Wilkins and Mr. Carter stare at him as if he "was some biological specimen hitherto unknown to science".
It was not easy to tell what species the creature belonged to. Indeed, if it resembled anything at all, it looked like an Egyptian mummy practicing for the hundred-and-twenty yards hurdles.
The Jennings Report
Jennings rescues a hedgehog and hides it in the luggage cupboard. Unfortunately, Mr. Wilkins wants to get his suitcase from the luggage cupboard that very night. Jennings ends up having to fetch Mr. Wilkins' suitcase himself and claim it's his good deed for the day.
A wildlife expert arrives to see the hedgehog. At the same time, a doctor arrives to see a boy with tonsillitis. Jennings and Darbishire don't know what the wildlife expert looks like. The boy told to watch for the doctor doesn't know what he looks like. You can guess where this is going.
