1918, Camden, London: elderly solicitor Mr. Blunden (Laurence Naismith) calls at the squalid home of widower Mrs. Allen (Dorothy Alison) to offer her a job as caretaker of run-down country mansion Langley Park. Despite rumours that the property is haunted, Mrs. Allen moves into the caretaker's cottage with her three children, teenagers Lucy (Lynne Frederick) and Jamie (Garry Miller), and their baby brother Benjamin (Benjamin Smith).

In the grounds of the house, Lucy and Jamie encounter the spirits of two children, Sara (Rosalyn Landor) and Georgie (Marc Granger), who have travelled from the year 1818 looking for help: their Uncle Bertie's wicked mother-in-law, Mrs. Wickens (Diana Dors) is trying to kill the children so that their inheritance will go to Bertie (James Villiers) and his child-like bride Anabella (Madeline Smith), and they need Lucy and Jamie to help them thwart the evil woman's plan.

The Amazing Mr. Blunden is best seen when young, when paradoxical plot problems are of little consequence. As a kid, I found the film charming and thoroughly entertaining. Nowadays, I can see that the storyline is far from perfect. For example, Sara and Georgie are found buried in the graveyard, having died as children in 1818, yet Sara is the great-great grandmother of Lucy and Jamie. How could this possibly be? Also, the potion that sends Sara and Georgie into the future sends Lucy and Jamie into the past, with no explanation as to why. However, even with these time-twisting issues, the film is a lot of fun, with memorable performances from all involved and confident direction by Lionel Jeffries.

7/10, with an extra point added for gorgeous, buxom Hammer babe Madeline Smith.