  Modeling the multiwavelength emission of successive regions in the jet of the
quasar PKS 1136-135 we find indication that the jet suffers deceleration near
its end on a (deprojected) scale of ~400 kpc. Adopting a continuous flow
approximation we discuss the possibility that the inferred deceleration from a
Lorentz factor Gamma=6.5 to Gamma=2.5 is induced by entrainment of external
gas. Some consequences of this scenario are discussed.
