Cassie's Birthday Surprise is the eleventh episode of the first season.
It is Cassie's birthday and Sierra and Jacob plan a surprise party for her at Knapford Station.
- This is one of the few episodes to have a confirmed date, with it being June 27th.
||Emily to the Rescue | Memories | Saving Benjamin | Rosie, Jacob, Sierra, and the Troublesome Trucks | Back In Service | Dockyard Tales | Homesick | Childhood Memories | The Best Start to Summer | Jacob and Rylie's Blue Mountain Adventure | Cassie's Birthday Surprise | A Surprise for Jacob | A Birthday Surprise for Caroline | Sir Handel and the Baking Soda | Toby and the Subway Car | Earls and Passengers | Trouble for Diesel 10 | Jacob and the Famous Visitor | Smudger Returns | Donald, Douglas, and the Trouble With Leaves | Gordon and the Railway Choice Awards | No Hamburgers for Duck | Emily's Arianating Experience | Paxton and the New Diesel | Murdoch's Money Madness | Harvey and the Railway Inspectors | Butch Proves a Point | Home, Sweet Home (cancelled) | Jacob's Unlucky Day (cancelled) | Gordon and the Famous Singer (cancelled) | The New Bridge (cancelled)
||Emily to the Rescue/Transcript | Memories/Transcript | Saving Benjamin/Transcript | Rosie, Jacob, Sierra, and the Troublesome Trucks/Transcript | Back In Service/Transcript | Dockyard Tales/Transcript | Homesick/Transcript | Childhood Memories/Transcript | The Best Start to Summer/Transcript | Jacob and Rylie's Blue Mountain Adventure/Transcript | Cassie's Birthday Surprise/Transcript | A Surprise for Jacob/Transcript | A Birthday Surprise for Caroline/Transcript | Sir Handel and the Baking Soda/Transcript | Toby and the Subway Car/Transcript | Earls and Passengers/Transcript | Trouble for Diesel 10/Transcript | Jacob and the Famous Visitor/Transcript | Smudger Returns/Transcript | Donald, Douglas, and the Trouble With Leaves/Transcript | Gordon and the Railway Choice Awards/Transcript | No Hamburgers for Duck/Transcript | Emily's Arianating Experience/Transcript | Paxton and the New Diesel/Transcript | Murdoch's Money Madness/Transcript | Harvey and the Railway Inspectors/Transcript | Butch Proves a Point/Transcript
||Emily to the Rescue/Gallery | Memories/Gallery | Saving Benjamin/Gallery | Rosie, Jacob, Sierra, and the Troublesome Trucks/Gallery | Back In Service/Gallery | Dockyard Tales/Gallery | Homesick/Gallery | Childhood Memories/Gallery | The Best Start to Summer/Gallery | Jacob and Rylie's Blue Mountain Adventure/Gallery | Cassie's Birthday Surprise/Gallery | A Surprise for Jacob/Gallery | A Birthday Surprise for Caroline/Gallery | Sir Handel and the Baking Soda/Gallery | Toby and the Subway Car/Gallery | Earls and Passengers/Gallery | Trouble for Diesel 10/Gallery | Jacob and the Famous Visitor/Gallery | Smudger Returns/Gallery | Donald, Douglas, and the Trouble With Leaves/Gallery | Gordon and the Railway Choice Awards/Gallery | No Hamburgers for Duck/Gallery | Emily's Arianating Experience/Gallery | Paxton and the New Diesel/Gallery | Murdoch's Money Madness/Gallery | Harvey and the Railway Inspectors/Gallery | Butch Proves a Point/Gallery
||Characters With Main Roles
||Emily | Brady | Olivia | Kylie | Benjamin | Rosie | Jacob | Sierra | Thomas | Glynn | Rylie | Cassie | Caroline | Skarloey | Rheneas | Sir Handel | Toby | Percy | Diesel 10 | Smudger | Duke | Gordon | Duck | Donald | Douglas | Paxton | Murdoch | Harvey | Butch | Fergus (cancelled)
||Brady | Olivia | Kylie | Benjamin | The Other Railway Diesels | Jacob | Kira | Sierra | Cassie | Rylie | Maddox | Brady the Human | Caroline