Complex sentence: She played Dr. Alison Porter in the SyFy series "Stargate Atlantis", appearing in the fifth season episode "Whispers", and as Marion Caldwell in three episodes on the television series Haven.
Split into simpler sentences: She played Dr. Alison Porter in the SyFy series "Stargate Atlantis", appearing in the fifth season episode "Whispers". And as Marion Caldwell in three episodes on the television series Haven.