Here are images from episode 18 of Tensou Sentai Goseiger. GoseiKnight is turning out to be a great new character in the show.
GoseiGreat goes through a few new formations using the Headers. Like the toys, you can place those Headers anywhere on his body.
Also, former Warstar villain Buredoran returns, revealed as one of the Yuumajuu. He's no longer Buredoran of the Comet, but Buredoran of the Chupacabra.
You can find these images added here: GoseiKnight Profile
You can find these images added here: Goseiger Group Images
You can find these images added here: Goseiger Robots
Makuin of the Blob
You can find this image added here: Makuin of the Blob Profile
Buredoran of the Chupacabra
You can find these images added here: Buredoran Profile