Below is the updated list for season five. I'm going to be starting it very soon(!), so let me know if you think someone else should be added:
Nancy Bell [as Ahni Jetal in “Latent Image”]
Olivia Birkelund [as Marla Gilmore in 'Equinox' Part 1]
Elizabeth Goldstein [as Alandra in “Someone to Watch Over Me”]
Christine Harnos [as Tessa Omond in “Timeless”]
Kristina Hayes [as Marci Collins in “11:59”]
Marva Hicks [as T'Pel in “Bliss”]
Nancy Hower [as Samantha Wildman in “Once Upon a Time”]
Laura Interval [as Erin Hansen in “Dark Frontier” Part 1]
Alissa Krämer [as Jenny Delaney in “Thirty Days”]
Heidi Krämer [as Megan Delaney in “Thirty Days”]
Lori Petty [as Noss in “Gravity”]
Susanna Thompson [as the Borg Queen in “Dark Frontier” Parts 1 and 2]
Kirsten Turner [as Constance Goodheart in “Night” et al]
Musetta Vander [as Tal in “The Disease”]
Kate Vernon [as Valerie Archer in “In The Flesh”]
McKenzie Westmore [as Jenkins in “Warhead”]
Nancy Bell [as Ahni Jetal in “Latent Image”]
Olivia Birkelund [as Marla Gilmore in 'Equinox' Part 1]
Elizabeth Goldstein [as Alandra in “Someone to Watch Over Me”]
Christine Harnos [as Tessa Omond in “Timeless”]
Kristina Hayes [as Marci Collins in “11:59”]
Marva Hicks [as T'Pel in “Bliss”]
Nancy Hower [as Samantha Wildman in “Once Upon a Time”]
Laura Interval [as Erin Hansen in “Dark Frontier” Part 1]
Alissa Krämer [as Jenny Delaney in “Thirty Days”]
Heidi Krämer [as Megan Delaney in “Thirty Days”]
Lori Petty [as Noss in “Gravity”]
Susanna Thompson [as the Borg Queen in “Dark Frontier” Parts 1 and 2]
Kirsten Turner [as Constance Goodheart in “Night” et al]
Musetta Vander [as Tal in “The Disease”]
Kate Vernon [as Valerie Archer in “In The Flesh”]
McKenzie Westmore [as Jenkins in “Warhead”]