The expected luminosity performance of FCC-ee/TLEP lead to the production of a Tera Z, several Oku W, several Mega Higgs and a Mega top, i.e., orders of magnitude above other projects on the market. Such large statistics samples allow the measurement of the properties of these particles with unprecedented accuracy, and are the tool of choice to discover and study rare Z, W, Higgs boson and top decays. Besides offering the ultimate investigations of electroweak symmetry breaking, these precision measurements would be highly sensitive to the possible existence of yet unknown particles, with masses up to 100 TeV. Sensitive searches for particles with couplings much smaller than weak, such as ‘sterile neutrinos', can be envisioned. Click on the figure to access to the original article 'A first look at the physics case of TLEP'.