Darn Bach o Hanes

Dewi Prysor explores a series of hidden tunnels in Tenby, and Gwennan Schiavone investigates a collection of papers from the Second World War. Plus, Rhodri Llwyd Morgan follows the trail of meteorites in north-west.

I have just copied and pasted this from the tv guide, I have no idea what the Welsh parts mean.

S4C Clirlun 9:00pm-9:30pm (30 minutes) Mon 20 Feb
Freeview channel 53 and if you are in the right region S4C is also on channel 4.

Hope this is in the right section!