Season 5 finds the team of intrepid explorers facing peril and uncertainty from within the vast reaches of the Pegasus Galaxy. It opens with Colonel Samantha Carter (Amanda Tapping) mounting a rescue mission to retrieve the missing team, before being called back to Earth after serving only one year as leader of Atlantis. There is mixed reaction to the appointment of her replacement: I.O.A. representative Richard Woolsey (Robert Picardo). His bureaucratic background will prove difficult for the maverick style of Lt. Colonel John Sheppard (Joe Flanigan). The brilliant Dr. McKay (David Hewlett) will face exceedingly difficult personal challenges, while Teyla (Rachel Luttrell) learns to integrate motherhood with her role as warrior. Ronan’s past will return to threaten him again and chief medical officer, Jennifer Keller (Jewel Staite), will find help from a most unlikely source. Meanwhile, a provisional relationship with the Wraith takes a shocking turn and new adversaries will test everyone’s courage and resolve.