Amongst the first diagnostic tools applied to characterize a discovered or produced plasma are surely electrical probes. And there is one major reason for that: simplicity. It appears strikingly easy to insert a wire that is insulated up to its very tip into the plasma, apply a variable voltage with respect to the surrounding vessel and measure the flowing current. This is a nice university experiment for undergraduate students. But an often experienced rule has it that diagnostic methods blessed with a simple set-up and a straight-forward measurement are inevitably supplemented by an elaborate extraction of the relevant physics parameters out of the data. In most applications the probe constitutes an essential disturbance for the plasma that itself is a very complex many-body system. Hence, a proper physical understanding of the non-linear response of the plasma to the exposure of the current carrying probe is needed to extract plasma parameters from the observations. The presence of an external magnetic field that breaks the symmetry is known to complicate the task even further. On the other hand fluxes of particles and energy impinge on the exposed probe so that design and save operation of probes are also demanding issues at least for high temperature plasmas (e.g. nuclear fusion applications). To cover these aspects of plasma diagnostics a little international workshop was organized by the Berlin Branch of the Max-Planck-Institute for Plasma Physics that was held every two years beginning in 1994. Starting with the second workshop the contributions have been published in "Contributions to Plasma Physics" and, therefore, we are glad to present here 21 contributions to the field given at the "5th International Workshop on Electrical Probes in Magnetized Plasmas" hosted by the branch institute of IPP in Greifswald in summer 2003. We want to thank the authors for their contributions and all participants for the lively discussions of the various probe issues during the workshop. Our thanks go also to the IPP for the support we got and for the organization of the meeting itself. Recognising with pleasure that our workshop is now quite mature we debated already for some time to arrange it outside the IPP and Germany next time and so we are glad to announce here that the 6th probe workshop is going to take place in Korea.