Season 4

the fourth season is first released in 2019 with twenty episodes.
 * 1) Skarloey's New Friend
 * 2) Broken Points
 * 3) Something Troubles
 * 4) Bus Blues
 * 5) Thomas and the two Diesels
 * 6) Mike and Frank
 * 7) Henry gets Tumbled
 * 8) Welcome Charlie
 * 9) Working the Points
 * 10) Gordon's Exploit
 * 11) Jeremy in Trouble
 * 12) Hanky Hank
 * 13) Doubling Derek
 * 14) Rolling stock Coming Througth!
 * 15) The Bridge Crash
 * 16) Thomas, Whiff and Scruff
 * 17) Your are a really noti engine
 * 18) Kirk Ronan Closure
 * 19) Fergus's Rock'n Roll
 * 20) Molly's Special Delivery

Characters Introduced

 * Luke
 * Rosie
 * D261
 * D199
 * Mike
 * Frank
 * Fergus Duncan
 * Charlie
 * Jeremy
 * Tiger Moth
 * Derek
 * Whiff
 * Scruff
 * Fergus
 * Molly