Nikolai is a fictional character portrayed by Callum Keith Rennie in the TV series Impulse.
In the first episode they appeared in, titled State of Mind (season 1), they were 57 years old.
They appear in 18 episodes out of a total of 20 aired and have accumulated 2205 positive votes.
The character of Nikolai is mainly associated with Ren Kido and Elaine Kido.
Episodes18
State of Mind
episode S1.E2 june 2018After a visit with a neurologist, Henry hopes her new meds will fix everything. Meanwhile, Bill Boone attempts to identify his son Clay's attacker.
Treading Water
episode S1.E3 june 2018Rattled by her newfound power, Henry tests her ability with the help of Thomas's daughter, Jenna Hope, and fellow outsider, Townes Linderman.
Vita/Mors
episode S1.E4 june 2018After finding herself in an unknown place, Henry seeks out Jenna and Townes in search of some answers.
The Eagle and the Bee
episode S1.E5 june 2018Left with no one's support, Henry returns to the unknown place only to discover a startling connection to her past.
He Said, She Said
episode S1.E7 june 2018After Henry and Clay have a fight, Cleo tries to make amends by inviting the Boones over for dinner. But the evening takes a devastating turn.
Awakenings
episode S1.E8 june 2018As Cleo fights for her daughter's well-being, Henry battles her own inner demons.
They Know Not What They Do
episode S1.E9 june 2018As Henry sets out to find her mother, Cleo navigates an unwanted showdown between Bill Boone and his business associates.
New Beginnings
episode S1.E10 june 2018After a heart-to-heart with Cleo, Henry faces a life-altering decision: leave Reston for a fresh start, or stay with the Hope family and confront her enemies.
Mind on fire
episode S2.E1 october 2019While contemplating what's next for her and her friends, Henry deals with the guilt on her shoulders over her actions.
Fight or Flight
episode S2.E2 october 2019Realizing the danger coming her way, Henry struggles to control her abilities.-
For Those Lost
episode S2.E3 october 2019Henry searches for answers regarding her Father's past. Lucas searches for redemption from his actions at the Millers' Church. 
The Moroi
episode S2.E4 october 2019In the aftermath of a brutal attack on his family, a young awakened Nikolai struggles for control of his powers.-
Crossing the Threshold
episode S2.E5 october 2019Henry tried to confront her darkest fears. A college visit for Jenna and Townes makes them question not just their decision to help Henry, but how they want to live their lives. -
Seven of Hearts
episode S2.E6 october 2019Henry questions Nikolai on his allegiance. Lucas struggles for a new path in life. 
The End of the World
episode S2.E7 october 2019Henry and Jenna attend their prom, where Jenna is forced to face the truth about herself.-
The Tether
episode S2.E8 october 2019Buried tensions come to light during a family dinner. Townes discovers more information about people with abilities. -
A moment of clarity
episode S2.E9 october 2019Nikolai betrays his employers, but contemplates about telling his secret to Henry. Henry struggles with how far she must go to protect her secret. -
Making amends
episode S2.E10 october 2019Nikolai tells the truth about Henry's father, awakening a dangerous and unstable side in her. Consumed with so much guilt and fear, Henry must make an ultimate decision to protect herself and the people she cares about.
- State of Mind
- Treading Water
- Vita/Mors
- The Eagle and the Bee
- He Said, She Said
- Awakenings
- They Know Not What They Do
- New Beginnings
- Mind on fire
- Fight or Flight
- For Those Lost
- The Moroi
- Crossing the Threshold
- Seven of Hearts
- The End of the World
- The Tether
- A moment of clarity
- Making amends
Best moments10
- In the aftermath of a brutal attack on his family, a young awakened Nikolai struggles for control of his powers.
- Nikolai betrays his employers, but contemplates about telling his secret to Henry. Henry struggles with how far she must go to protect her secret.
- Nikolai tells the truth about Henry's father, awakening a dangerous and unstable side in her. Consumed with so much guilt and fear, Henry must make an ultimate decision to protect herself and the people she cares about.
- Henry questions Nikolai on his allegiance. Lucas struggles for a new path in life.
- Realizing the danger coming her way, Henry struggles to control her abilities.
- Buried tensions come to light during a family dinner. Townes discovers more information about people with abilities.
- Henry and Jenna attend their prom, where Jenna is forced to face the truth about herself.
- Henry tried to confront her darkest fears. A college visit for Jenna and Townes makes them question not just their decision to help Henry, but how they want to live their lives.
- While contemplating what's next for her and her friends, Henry deals with the guilt on her shoulders over her actions.
- Henry searches for answers regarding her Father's past. Lucas searches for redemption from his actions at the Millers' Church.
- The Moroi
- A moment of clarity
- Making amends
- Seven of Hearts
- Fight or Flight
- The Tether
- The End of the World
- Crossing the Threshold
- Mind on fire
- For Those Lost