Guest Stars Tanya Reynolds as Gwynn Iwan Rheon as Rob Steve Speirs as Steve Sasha Latoya as Ciara Bethan Bevan as Dog Walker 2 Hannah Cadec as Mermaid Rhodri Miles as Doctor Rebecca Jade Hammond as Meg Nia Trussler Jones as Dog Walker 1 Daniel Lloyd as Singer Bois Y Bryn as Shanty Singers
