The Restatement of Torts (Third) and the European Product Liability Directive

What is product or products liability? Simply, it means liability for harm caused by a product. But this is where the American consensus ends and the legal fun begins. Whose liability? The manufacturer's? The carrier's? The seller's? Can one successfully sue the" mom and pop" bicycle shop that unknowingly sold a defective bicycle helmet? Yes, in the United States. Generally not, in Europe. Harm to whom and to what? Just to the ultimate consumer (and his or her property), or also to the person whom the ultimate consumer injures with the product?