Thomas the Tank Engine & Friends Season 19 Episode 21 Rocky Rescue Episode Title:Rocky Rescue.Episode Description:Henry has derailed off the tracks down from Ulfstead Castle to the junction near Ulfstead Mine. Thomas rushes to the Sodor Search & Rescue Center, but to the other rescue vehicles disappointment it is Rocky who is needed. Thomas arrives to Henry's site with Rocky, and he places him back on the rails again, but when a couple of workmen tries to get a large rock off the tracks, it suddenly bumps into Rocky and sends him flying down the tracks; until he derails at a junction. Thomas rushes back to the Sodor Search & Rescue Center, where he alerts the other rescue vehicles; and they set off to rescue Rocky. After realizing that neither one of them can help Rocky; he tells them that they need to work together.