Dorn is Castleford's leading try-scorer with 19 touchdowns this season

Harlequins' latest new addition Luke Dorn feels the club has completely changed since his two-year spell at The Stoop which ended in 2006.

The Australian told BBC London 94.9: "I'm coming back to a totally different club. My last season Brian McDermott took over with about eight games to go.

"The way the club has changed since then is completely different.

"I am going back to a club that I am familiar with but in my opinion it is pretty brand new."

Dorn is Harlequins' third new signing ahead of the 2009 season, and they have now got a squad of 23 players already in place.