When Duty Calls () is a 20-episode Singaporean drama produced and telecast on Mediacorp Channel 8 in 2017. It was made to commemorate 50 years of National Service in Singapore. It is sponsored by the Ministry of Defence and Ministry of Home Affairs.
It stars Desmond Tan, Romeo Tan, Pierre Png, Paige Chua, and Felicia Chin as the main cast of the series.
Filming began in February 2017 and was completed in May. The series was filmed in collaboration with the Ministry of Defence (MINDEF) and Ministry of Home Affairs (Home Team).