S1/E2.
It is Lennie Godber's first time in prison, and Fletcher shows him the ropes, as the two go through the checking-in process along with the rather dim-witted Heslop. Mackay explains that Heslop is not too much of a threat, as he is "thick as two short planks"; Godber is young and naive, but Mackay comments that he may be corrupted by the older Fletcher, who has been in and out of jail. Upon meeting the new arrivals, Mackay gets Fletcher to tell Godber and Heslop about prison routine.
