New arrivals Eidur Gudjohnsen, Younes Kaboul and Kyle Walker go straight into the squad for Saturday's big Premier League clash against Villa.
Neither were available for Wednesday's FA Cup replay at Leeds United, although Eidur can now play in the fifth round at his former club Bolton. Younes and Kyle are cup-tied.
Ledley King is fit again and both Luka Modric and Wilson Palacios come back into the frame after being on the bench for the 3-1 win at Elland Road.
Roman Pavlyuchenko remains a doubt with a groin problem and although Aaron Lennon is also out with his groin injury, there is encouraging news on his progress. "He's getting closer," said Harry. "He's working with the fitness coaches at the moment.
"He's not doing ball work yet but he's running again in straight lines and will soon be checking, twisting and turning again. He's on his way back."
Benoit Assou-Ekotto (hip), Jonathan Woodgate (groin) and Carlo Cudicini (wrist, pelvis) remain sidelined.
Meanwhile, in terms of the role of captain following Robbie Keane's loan departure to Celtic, Harry added: "Michael Dawson has been captaining the side and Ledley King can as well, it's not a massive problem.
"They are both terrific characters and if it's not one of them, there are many other players who can do it.
"Whoever takes the armband I've got faith in them to be able to carry out what I want from them on the pitch."