Jacobs Hammer is a 2012 English-language Horror film. Sadie dotes on six year old son Jacob. He is her only source of comfort and her only true friend. But, deep down Sadie has always known that there is something not quite right about 'her boy'. That is why she tries to keep him out of sight from the rest of the world. For years she has dealt with the strange noises in the night, nightmares and ghostly apparitions but when friends and family start to meet with brutal and tragic ends Sadie is left with no choice. It's time to accept the truth and confront the evil.. Jacob's Hammer.. When a mother's love is no defence.. Written by Anonymous. Jacobs hammer stars Helen Holman in the lead role along with an ensemble cast including Luis James Farouk, Diane Rimmer, George Mccluskey, Thom Heath, Christain Lopez and Adi Alfa.