What season on charmed did cole helped piper to go back to her body?

In Season 3 of "Charmed," Cole helps Piper go back to her body in the episode titled "All Halliwell's Eve." In this episode, Piper's spirit is temporarily separated from her body during a Halloween adventure involving time travel. Cole, who is deeply in love with Piper, uses his powers and knowledge to assist her in returning to her physical form. This moment highlights their growing bond amidst the challenges they face.