WLWT Investigates, Dateline to shed new light on Katelyn Markham case: how to watch WLWT Cincinnati'Dateline' season 33 premiere to look at Katelyn Markham case. How to watch The Cincinnati Enquirer‘Dateline’ Season 33 begins with case of missing Ohio art student Katelyn Markham NBC4 WCMH-TVDisappearance and death of Fairfield’s Katelyn Markham to air on ‘Dateline’ tonight Hamilton Journal News