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We study the three-dimensional evolution of a viscous protoplanetary discwhich is perturbed by a passing star on a parabolic orbit. The aim is to testwhether a single stellar flyby is capable to excite significant discinclinations which would favour the formation of so-called misaligned planets.We use smoothed particle hydrodynamics to study inclination, disc mass andangular momentum changes of the disc for passing stars with different masses.We explore different orbital configurations for the perturber's orbit to findthe parameter spaces which allow significant disc inclination generation.Prograde inclined parabolic orbits are most destructive leading to significantdisc mass and angular momentum loss. In the remaining disc, the final discinclination is only below $20^\circ$. This is due to the removal of discparticles which have experienced the strongest perturbing effects. Retrogradeinclined parabolic orbits are less destructive and can generate discinclinations up to $60^\circ$. The final disc orientation is determined by theprecession of the disc angular momentum vector about the perturber's orbitalangular momentum vector and by disc orbital inclination changes.  We propose a sequence of stellar flybys for the generation of misalignmentangles above $60^\circ$. The results taken together show that stellar flybysare promising and realistic for the explanation of misaligned Hot Jupiters withmisalignment angles up to 60\degr.

Generation of highly inclined protoplanetary discs through single stellar flybys