We don't know yet

@Diamondrose282 I thought the opening and revel for the new fire station would be first episode witch named come to Pontypandy. but from the description of the episode it does seem that new fire station will show in that episode.

When filming a tourism advert about Pontypandy, Sarah gets carried away with her filming. When she climbs a mountain to get the perfect shot, she ends up stranded on a ledge.