Luton Town earned the first home league win of manager Jack Wilshere's reign after beating Huddersfield Town 2-1 at Kenilworth Road.
Jake Richards and Jerry Yates were on target for the hosts, while Castledine's spectacular free-kick briefly hauled Huddersfield level in a contest that swung one way and then the other.
Richards Strikes for a Deserved Lead
The hosts threatened early on when Jerry Yates saw his volley turned behind by goalkeeper Owen Goodman, but they did take a deserved lead in the 34th minute when Jake Richards' first-time effort from 22 yards out took a slight nick to wrongfoot the Terriers stopper and fly into the net.