Direct time domain solutions for radiation from and scattering by thin conducting wires are considered. The problem is formulated in terms of two coupled integrodifferential equations derived from the retarded potentials, the continuity equation, and the boundary conditions for the wire. Solution of these equations is effected using the method of moments resulting in a set of simultaneous time iterative matrix equations. A time domain reciprocity theorem suitable for thin wire objects is also presented. The theorem demonstrates the relationship between reciprocity and the adjoint operator for the problem. Two moment solutions are presented for straight wires: (1) a point tested solution, and (2) a pulse tested solution. The radiation field is found by direct application of the reciprocity theorem. All solutions are presented as algorithms suitable for computation. The algorithms are time iterative by nature, and inexpensive in terms of computer time. Computed results are presented for the straight wire scatterer excited by a plane wave with unit step time dependence. The “end fire” effects predicted by traveling wave theory are observed in the scattered field results. The source of these effects is shown to be the end of the wire last intercepted by the incident field. Additional results are presented for the straight wire antenna excited by a unit step voltage applied at an arbitrary driving point. The computed driving point current is compared to the results derived for the case of an infinite wire antenna over the time interval that the comparison is valid.