 After returning to Shrewsbury, Demetriou made his first League One start of the season away to Millwall on 9 April 2016.When goalkeeper Mark Halstead was sent off with a minute remaining and no substitutions remained, Demetriou volunteered to take over in goal to face Lee Gregory's penalty; he guessed the right way but did not save it, and Shrewsbury lost 3–1.After picking up a knee injury (torn meniscus) just 10 minutes in to the same match, although playing the full 90 minutes on it he was later ruled out of action for the rest of the season.