S2 E1 • The Second Wave

Première diffusion : 2 octobre 1989

S2 E2 • No Direction Home

Première diffusion : 9 octobre 1989

S2 E3 • Doomsday

Première diffusion : 16 octobre 1989

S2 E4 • Terminal Rock

Première diffusion : 23 octobre 1989

S2 E5 • Breeding Ground

Première diffusion : 30 octobre 1989

S2 E6 • Seft of Emun

When the Morthren run low on power, they are forced to bring Seft, the High Priestess of Emun, out of stasis. While Seft is searching for the materials she will need to create power crystals for her captors she meets Harrison. Will the link forged between them be enough to save Seft and her son, or is she doomed to forever serve the evil Morthren?

Première diffusion : 6 novembre 1989

S2 E7 • Loving the Alien

Suzanne helps her friend Marcus search for his missing daughter, unaware that the girl has been captured by the aliens. Meanwhile, Debi runs away in search of someone who understands her. She finds that person in a pale, strange boy named Ceeto.

Première diffusion : 13 novembre 1989

S2 E8 • Night Moves

Première diffusion : 20 novembre 1989

S2 E9 • Synthetic Love

Première diffusion : 15 janvier 1990

S2 E10 • The Defector

When an attempt to hack into the humans' computers goes awry, a Morthren technician (Kemo) is scarred both physically and mentally by the experience. Facing execution, he flees and takes over the identity of the human hacker he killed.

Première diffusion : 22 janvier 1990

S2 E11 • Time to Reap

The Eternal instructs Malzor on how he can go back in time to 1953 in the aftermath of the failed invasion to ensure victory by inoculating his brethren from Earth's bacteria in order to change the course of history in the favour of the Morthren race. However, Blackwood and Kincaid have followed him through the same time tunnel to stop him from succeeding in giving the aliens a huge advantage in their conquest.

Première diffusion : 29 janvier 1990

S2 E12 • The Pied Piper

Première diffusion : 5 février 1990

S2 E13 • The Deadliest Disease

Warring factions (including the Blackwood team and the Morthren) fight over a med cell that could save countless lives--including that of a dying Mana.

Première diffusion : 12 février 1990

S2 E14 • Path of Lies

While Ardix bargins with a dying millionare's life for access to a communication's satellite, the aliens are trying to kill nosey reporter Marc Traynor. During an assassination attempt, the reporter snaps images of dead alien bodies. To make matters worse, Kincaid and Blackwood are seen killing them. If published, their identities will be revealed and easier for the aliens.

Première diffusion : 19 février 1990

S2 E15 • Candle in the Night

While the aliens try to recover a malfunctioning surveillance device, the team plots a surprise birthday party for Debi.

Première diffusion : 9 avril 1990

S2 E16 • Video Messiah

Première diffusion : 16 avril 1990

S2 E17 • Totally Real

Première diffusion : 23 avril 1990

S2 E18 • Max

Première diffusion : 30 avril 1990

S2 E19 • The True Believer

Première diffusion : 7 mai 1990

S2 E20 • The Obelisk

Première diffusion : 14 mai 1990