We begin with a look back in time at P.R.R. power in action including M1, L1, I1, K4 and H9 steam, GG1, P5 and MP54 electrics and first generation diesels including the Aero Train at locations including Altoona, Johnstown, Canton, Sunbury, Horseshoe Curve, Enola, Lancaster, Whitford and Philadelphia, Pennsylvania, Dover, Delaware, Cape Charles, Virginia and locations along the P.R.S.L. in New Jersey. Next we see The Reading Company in action with steam, diesels and electrics at locations including Harrisburg, Reading, Valley Junction, Norristown, Tamaqua, West Milton and selected locations on the P.R.S.L in New Jersey.