10 MORE Star Trek Moments That Broke Our Hearts

5. Trip And T'Pol - Terra Prime

Few things will ever cut as deeply as losing a child. For Trip and T'Pol, whose relationship the audience had watched grow - stilted, yet powerful - the culmination of their journey was devastating. 

Demons and Terra Prime served to highlight the evil of racism and xenophobia, with both sadly surviving on Earth into the 22nd century. As part of their plot to fuel hatred of non-humans, Paxton's terrorist organisation presented Elisabeth - the half-human, half-Vulcan daughter of Trip and T'Pol. They claimed that mixing species spelt the end of humanity.

What they failed to mention was the botched cloning process they utilised to create Elisabeth as part of their plan. Though the group was stopped, there was nothing that Dr Phlox could do for her. She dies, leaving Trip and T'Pol to grieve the daughter they never knew that they had, though loved no less for it.

Star Trek: Lower Decks' penultimate episode offered a salve for this wound, as it was revealed that, in at least one universe, Trip and T'Pol married and stayed together for sixty years.