No significant deviations from the Standard Model predictions have been observed at particle physics experiments, except for neutrino masses. On the other hand, astrophysical evidence for dark matter also points to new physics. In theories beyond the Standard Model of particle physics, neutrino masses and dark matter might have a common origin. Additionally, these theoretical models predict the existence of particles with large lifetimes, named nowadays long-lived particles (LLPs). In this talk, I will motivate the quest for new, long-lived physics able to explain both neutrino masses and dark matter. I will provide a concrete example within a scotogenic-like model and demonstrate how the dark matter and the collider phenomenology of such models can be put to the test at dark matter direct detection experiments, as well as the Large Hadron Collider operating at CERN