Once a year, a special sight can be seen on one of London's most iconic bridges, as herds of sheep cross over.
Heledd Cynwal experiences the unique tradition that celebrates the trading link between Wales and London.
TX: Sunday 23 April 8.00pm , S4C
Episode four shows the museum on it's busiest day of the year, as thousands of visitors enjoy the annual food festival.
The resurrection of the Vulcan Hotel continues as the stained-glass windows are given a new lease of life.
Wednesday, 26 April, 8.25pm
ALSO
What's happening in Cwmderi?
What's happening in Glanrafon?
