The photos show various members of New Directions playing each other after Tina (Jenna Ushkowitz) suffers a concussion during rehearsals and experiences an alternate reality.
Tina herself switches places with Rachel, Blaine becomes Puck and Mike swaps bodies with Joe, TV Line has revealed.
Images also show Sugar dressed as Quinn, Rory dressed as Sam and Will in a Sue Sylvester-esque tracksuit, suggesting that Jane Lynch's devious character will be coaching the glee club.
Previous spoiler pictures have also shown Finn dressed in an outfit more suited to his step-brother Kurt.
Chris Colfer, who plays Kurt, has admitted that it was "really hard" taking on the mannerisms of his Glee co-stars.
"It was also nerve-wracking because I didn't want to disrespect anybody," he explained.
Glee's body swap episode airs as part of a double-bill on May 15. The show continues in the UK Thursdays at 9pm on Sky1.