"Redemption" features a brand new opening sequence, with various shots of the gate spinning, and Michael Shanks' name being removed to make way for Corin Nemec's in between Christopher Judge and Don S. Davis.
In most of the shots in "Abyss" where Ba'al is talking to O'Neill, Cliff Simon is actually talking to a stand-in for O'Neill and not Richard Dean Anderson due to the limited time Richard Dean Anderson had in which to film the episode [REF].