I shall talk about the production and decay of the first Kaluza-Klein electron in the context of a linear $e^+e^-$ collider. The KK electron decays into a KK photon (carrying away missing energy) and standard electron. The KK electron and photon states are heavy with their masses around the inverse radius of compactification, and their splitting is controlled by radiative corrections originating from bulk and brane-localised interactions. The signal events are $e^+e^-$ plus large missing energy. I will comment on how this signal may be distinguished from similar events from other new physics.

Saha Institute of Nuclear Physics, Calcutta