Count the Tatiana Maslanys.

1. One pass, zero Tatiana Maslanys.

2. One Tatiana Maslany, as Sarah.

3. One Tatiana Maslany, as Alison.

4. One Tatiana Maslany as Sarah, opposite acting double, Kathryn Alexandre, as Alison.

5. Two Tatiana Maslanys, one as Sarah, one as Alison.

6. Gif of you, watching this, gaping in awe, wondering if Tatiana Maslany would be better at playing you than you are.

Tatiana Maslany. Putting the special in special effects.