A picture of Stephen Amell as Oliver Queen from the TV series "Arrow." Facebook/ Arrow

Oliver will need some help in “Arrow” Season 4 episode 15. He will ask an old friend who goes by the name of Vixen to help. Felicity will finally find out about the secret her fiancé has been keeping from her.

[Spoiler alert]

The promo video of the next episode shows Damien Darhk (Neal McDonough) boasting that he has kidnapped William. A surprised Felicity (Emily Bett Rickards) asks her fiancé about William. Oliver (Stephen Amell) has no choice but to confess that William is his son.

A major focus in the previous episode was about trust in a relationship and about keeping secrets. Felicity was happy that there were no secrets between her and Oliver and was busy preparing for the wedding. This new revelation may now impact their relationship.

Damien is confident of taking on the superhero and one of the action sequences from the next episode shows him fighting with Oliver. “I think we’ve seen that movie before. I win, you lose, rinse repeat,” Damien tells Oliver.

Oliver wants to make sure that his son is safe before taking any drastic steps in “Arrow” Season 4 episode 15. He will enlist the help of an old friend Vixen (Megalyn Echikunwoke).

Vixen is described a “hero in Detroit.” This will be first time the character will be seen in the TV series and the trailer shows the character in an action sequence. The character has already been introduced in the animated web series.

Oliver is also busy fighting the Mayoral election. The Demolition Team failed in their mission to kill Oliver and ensure an easy victory to his opponent. Even if Oliver manages to rescue his son, the revelation may impact his prospects in the election.

Promo pictures of “Arrow” Season 4 episode 15 posted on Heroic Hollywood tease some of the scenes. There are also pictures of Vixen standing with Oliver and helping him deal with Damien.

Credit: YouTube: The CW Television Network