4 and 5 are titles only. But it sounds like the first three episodes form a continuous plot thread.

Episode 2: 風を掴め！Storm Access – Kaze wo Tsukame! Sutoomu Akusesu (Catch the Wind! Storm Access)

Yusaku managed to capture the mysterious lifeform as he chases after the Knights of Hanoi. In order to defeat them, he logs into the VR Space network, Link VRAINS, as Playmaker. He commenced a Duel, holding the lifeform as a hostage. However, the lifeform predicted that “Yusaku can’t win with his deck,” and performed a certain action…

Script: 吉田伸 || Yoshida Shin

Storyboard: 須永 司 || Sunaga Tsukasa

Direction: 武藤公春 || Mutou Kimiharu

Animation Director(s): 川村裕哉, 宇代祐規 || Kawamura Yuya, Ushiro Yuki

Episode 3: ファースト・コンタクト – Faasuto Kontakuto (First Contact)

Yusaku begins to examine the information hidden in the mysterious lifeform. Meanwhile, after his Duel against the Knights in the network, he became famous as the hero who saved Link VRAINS. Learning that the lifeform is with Playmaker, SOL Technology sets up an operation to capture it…

Script: 吉田伸 || Yoshida Shin

Storyboard: 髙田昌宏 || Takada Masahiro

Direction: 三家本泰美|| Mikamoto Yasumi

Animation Director(s): TBA

Episode 4: カリスマデュエリストGo鬼塚 Karisuma Dyueisuto Go Onizuka (The Charisma Duelist: Go Onizuka)

Script: 武上純希 || Takegami Junki

Storyboard: 山本隆太 || Yamamoto Ryuta

Direction: 布施康之 || Fuse Yasuyuki

Animation Director(s): TBA

Episode 5 鳴動のスリーカウント Meidou no Surii Kaunto (The Bell Rings on the Count Of Three)

Script: 武上純希 || Takegami Junki

Storyboard: ありえゆうき || Arie Yuki

Direction: 神原敏明 || Kamihara Toshiaki

Animation Director(s): TBA

Thanks to DMC344 for the translations. Episode Title for Episode 5 has been translated differently by me to get the point across clearer.