Atlantis Season 4

The fourth season of Stargate Atlantis began airing on Sci-Fi Channel in the US on September 28, 2007. This season, it moved to a new timeslot: 10:00pm Eastern/Pacific time, 9:00pm Central. The premiere, "Adrift", picks up seconds after the events of "First Strike", the season 3 finale. Torri Higginson and Paul McGillion are no longer regulars in season four, and Amanda Tapping joins the cast, carrying the role of Samantha Carter over from SG-1.

Main characters

 * Joe Flanigan as Lt. Col. John Sheppard (20/20 episodes)
 * Amanda Tapping as Col. Samantha Carter (14/20 episodes)
 * Rachel Luttrell as Teyla Emmagan (16/20 episodes)
 * Jason Momoa as Ronon Dex (18/20 episodes)
 * David Hewlett as Dr. Rodney McKay (20/20 episodes)

Recurring characters

 * David Nykl as Radek Zelenka (11/20 episodes)
 * Jewel Staite as Jennifer Keller (11/20 episodes)
 * Kavan Smith as Evan Lorne (8/20 episodes)
 * Chuck Campbell as Chuck (8/20 episodes)
 * Christopher Heyerdahl as Todd (6/20 episodes)
 * Bill Dow as Bill Lee (4/20 episodes)
 * Linda Ko as Marie (4/20 episodes)
 * Torri Higginson as Elizabeth Weir (4/20 episodes)
 * Connor Trinneer as Michael Kenmore (3/20 episodes)
 * Michael Beach as Abraham Ellis (3/20 episodes)
 * Jill Wagner as Larrin (2/20 episodes)
 * Patrick Sabongui as Kanaan (2/20 episodes)
 * Niall Matter as Kemp (2/20 episodes)
 * Brenda James as Katie Brown (2/20 episodes)
 * Gary Jones as Walter Harriman (2/20 episodes)
 * Robert Picardo as Richard Woolsey (2/20 episodes)
 * Mitch Pileggi as Steven Caldwell (2/20 episodes)
 * Christopher Judge as Teal'c (2/20 episodes)
 * Paul McGillion as Carson Beckett (2/20 episodes)
 * Yee Jee Tso as Systems Tech (2/20 episodes)
 * Heather Doerksen as Pat Meyers (2/20 episodes)
 * Johann Helf as Nabel Golan (2/20 episodes)
 * Kate Hewlett as Jeannie Miller (2/20 episodes)

DVD

 * Stargate Atlantis: The Complete Fourth Season

Novels

 * Stargate Atlantis: Nightfall (Preceded by The Seer and followed by Miller's Crossing)
 * Stargate Atlantis: Angelus

Audiobooks

 * Stargate Atlantis: A Necessary Evil (just after Lifeline)
 * Stargate Atlantis: Zero Point&#160;(Between Reunion and Midway)
 * Stargate Atlantis: Impressions (between Reunion and Doppelganger)