I. To compare the overall response rate assess the efficacy of MK-1775 (WEE1 inhibitor MK-1775) in combination with cisplatin to cisplatin alone in patients with recurrent or metastatic squamous cell carcinoma of the head and neck (SCCHN) as per overall response rate (using Response Evaluation Criteria in Solid Tumors [RECIST] criteria version [v]1.1).