01 — The Big Apple Mystery

02 — The Missing Pickle Car Mystery

03 — The Mystery Wheel

04 — Busytown Blue-Bottoms

05 — The Mystery of the Lost Parrot

06 — The Monster Mystery

07 — The Trouble with Bubbles

08 — Little Orphan Egg

09 — The Lighthouse Ghost Mystery

10 — Cornfield Confusion

11 — The Sticky Stuff Mystery

12 — Up, Up and Away

13 — Six Little Muffins

14 — The Crashing Cans Mystery

15 — The Invisible Cake Snatcher

16 — On the Move

17 — Litterbug Busters

18 — There Might Be Giants

19 — Where's Junior?

24 — Where's the Hero?

27 — Chain of Mysteries

28 — The Mystery of the Unfinished Painting

29 — The Pretty Park Mystery

30 — The Missing Museum Statue Mystery

31 — The Vanishing Tiara Mystery

32 — The Postage Stamp Mystery

33 — The Bank Note Mystery

34 — The Flying Saucer Mystery

36 — The Mystery Present

37 — The Falling Fruit Mystery

38 — The Dragon Hunters

39 — The Disappearing Swimming Hole

40 — The Forgotten Fire Hose Mystery

41 — The Disappearing Home Mystery

42 — The Flipping, Flying, Slipping, Sliding Mystery

43 — The Mystery of the Unpopular Pizzeria

44 — The Silly Scarecrow Mystery

45 — Huckle, Where's My Apple Car?

46 — The Dirty Laundry Mystery

47 — The Eight Shoes Mystery

48 — The Something in the Woods Mystery

49 — The Borrowed Book Mystery

50 — The Mystery of the Missing Mystery Books

51 — The Mystery of the High Jumper

52 — The Mystery of the Summer Snowman