 In the episode "Smoke Gets in Your CSIs", Eric finally tells Calleigh that he couldn't imagine living his life without her, and in the episode "Sink or Swim", Calleigh and Eric share a kiss after Eric is released from jail for having a fake birth certificate.In the episode "Wolfe in Sheep's Clothing", Eric is seen waking up nude in Calleigh's bed and they share a bathroom as they get ready in the morning.As of Season 7, they are in a romantic relationship that they are keeping hidden from the rest of the team.