There will be no more of the gay male nurse because the producers felt he has reached a dead end.
One of the secondary characters of "Nurse Jackie" will be mysteriously missing when the show returns on March 22 for the second season. Mohammed de la Cruz aka Mo-Mo is confirmed by a rep from Showtime to be no longer part of the show.
Explanation is not given as to why the character played by Haaz Sleiman is extracted. A rep for the actor however shed a little light, saying that the producers felt "the character's storyline ran its course. We were surprised. It came out of left field." EW said Mo-Mo's departure is not even addressed in the first two episodes of the second season.
Mo-Mo's absence has actually been a curious case when he was not included in the new promotional poster that was released on Sunday, December 20. Being the gay nurse whom Jackie turns to when she seeks peace and quiet in the hospital's chapel, Mo-Mo can be regarded the secondary character. Other than being Thor's crush however, he was indeed given little storyline that delves into his personal life.