We look at the whole railway including the opening days for the sections through Beddgelert to Hafod y Llyn, special trains and events such as Halloween and Christmas.
Then there is the Garratt 50 event celebrating the construction of No. 143, with more than fifty Garratts in attendance.
There is a footplate ride from Hafod y Llyn to Rhyd Ddu using a mini-cam mounted on the engine, plus other footplate and lineside footage.
The Welsh Highland Heritage Railway is covered with a variety of visiting locomotives and a look at the Gelerts Farm Museum.
Finally interviews with Paul Lewin from the Welsh Highland Railway and James Hewett of the Heritage Railway.