Johnson and his friends are toys that belong to a boy named Michael, unseen except for when he sleeps in his bed. They reside in his bedroom, but do not move or show any signs of life until he has left the room or has fallen asleep. Each episode involves a story about the toys and it will usually have an educational message to convey to the viewer.
The series is aimed at children less than five years old, and plays upon their fascination with the notion that toys come to life while they are gone. However, the stories often have a deeper message, and sometimes they are very poignant.
Johnson: (voiced by Garry Scale) The leader of the toys. A furry pink elephant who loves being an In The Home Coordinator. Johnson is the wisest and oldest of the group, despite a shortcoming of not been able to count past one, and a tendency towards impatience sometimes.
McDuff: (voiced by Katrina Sedgwick) A blue and yellow concertina who loves having fun. Although she is a little silly, McDuff is a kind and loyal friend, especially towards the misunderstood Diesel.
Diesel: (voiced by Doug Scroope) A red toy truck with a yellow and black hat that spends most of his time going "bruuum, bruuum" around the floor. He speaks with a very pronounced Australian accent. Although brusque, he means well and is obviously fond of his friends.
Alfred: (voiced by Peter Browne) A green hot water bottle, which is technically not a toy. He is a real fusspot and lives in the dark, dank area of the bedroom that is under the bed. He is neurotic and anxious and complains constantly. His face wears an aggrieved expression, but it is Alfred that supplies a lot of the humour. He also owns an old "banana skin blanket" which he is very protective of. Although grumpy and sometimes selfish, Alfred is generally good natured and helps Johnson out on his endeavours.
Squeaky: (voiced by Emily Lumbers (Series 1), Kristen Lyons (Series 2), Sarah Boddy (Series 3 and 4) and Angela Toohey a singing voice) A black and red robot. She guards the bedroom while Michael is asleep and loves singing to herself. She is childlike and believes that the vacuum cleaner is her mother. She does not appear in every episode.
Victoria: (voiced by Deborah Kennedy) A slow-moving orange and purple dinosaur that actually belongs to Michael's elder sister, Melissa; Victoria will often appear at the door of Michael's bedroom with some bad news she has just heard.
Alphonse: (voiced by Peter Browne) Alfred's long lost friend from the hot water bottle factory, he mentions that he and Alfred are both very musically talented and were once known as "The Hot Water Rockers".
Albert: (voiced by Peter Browne) Another hot water bottle acquaintance of Alfred's, Albert is known for his temper.
Alfred's Friends: Aside from Alphonse and Albert, Alfred is shown to have many hot water bottle friends, whom he has invited to the bedroom at least once.
Michael: The boy who owns the toys, he is only seen while asleep, but is frequently mentioned throughout the series.
Melissa: Michael's sister who is the owner of Victoria. She is never seen on screen, only mentioned.
Michael's Mum and Dad: Michael's parents are occasionally mentioned throughout the series, however, they never appear physically.
Michael's Aunt and Uncle: Michael's Aunt and Uncle are mentioned very briefly in one of the episodes.
Baby: Michael's infant cousin made a non-physical appearance in one of the episodes.
Diesel and McDuff admire some balloons hanging on the bedroom door, they suggest to Johnson that he should move them into the sunlight, which he reluctantly agrees to do, but disaster strikes when Johnson begins to float away!
Squeaky is pretending to be a superhero and the toys are sick of it. They devise a plan which fails, upsetting Squeaky, but they soon find themselves in trouble. Will Superbot forgive them and save the day?
The toys give each other presents - it only results in disaster. Johnson decides to ask Santa for advice, but when he doesn't show up, Johnson is in a state of desperation. Little does he know that luck is on his side.
When Michael's family heads off to the New Year's Eve fireworks, Alfred hypothesises that time is controlled by the ticking of a clock, Johnson accidentally breaks Michael's alarm clock and the toys panic, until they hear a strange sound coming from the hallway.