Odo is a changeling whose common structure is puddle of fluid. He has an enlightening minute when he meets a being named Laas from his own race who does not share Odo’s need to “pass” as a species with a solid structure. Odo is faced with the prejudices of others, even some of his companions, who state to be alright with changelings. That is to say, they are okay as long as they don’t see them change their form or exist as something apart from a humanoid.
4. “Stigma” from Enterprise
With clear parallels to the real story of AIDS in ’80s America, this episode of the last Star Trek series (which happens 100 years before the times of Kirk and Spock) finds T’Pol, The Enterprise’s Vulcan first officer, contracting Pa’nar Syndrome. It’s a disease that is spread through mind melds. This act is viewed as unnatural in Vulcan culture amid this time and is believed to be practised by just a couple of degenerate telepaths. In view of this disgrace, Vulcan doctors are unwilling to supply research, prescription, or examine protective measures about the spread of the ailment. The Enterprise team soon wind up combating one of their most troublesome adversaries they’ve ever experienced and that is; Vulcan prejudice.