In the episode "Hello, Dexter Morgan", they secretly get married with Dexter as witness.
Dexter | Dexter (TV series) | Morgan Stanley | Morgan Freeman | Dexter Gordon | J. P. Morgan | Piers Morgan | Morgan Tsvangirai | John Hunt Morgan | Morgan Spurlock | Morgan | J.P. Morgan & Co. | John Dexter | Harry Morgan | Frank Morgan | Dexter, Michigan | Dennis Morgan | Morgan County | Lorrie Morgan | Henry Morgan | Tracy Morgan | Morgan horse | Morgan Fairchild | Michèle Morgan | Augustus De Morgan | Dexter and sinister | Dennis Morgan (songwriter) | Thomas Hunt Morgan | Harry Dexter White | Colin Dexter |
In Dexter, serial killer Dexter Morgan knocks out his victims using a syringe of M99 (etorphine) in almost every episode throughout the show.