Ep. 20: Investigation team uses surveillance to monitor Yotsuba Group while L suspects Light.
Aired on February 28, 2007

The investigation team installs wiretaps and surveillance cameras to monitor Yotsuba Group meetings, noting their open discussion of Kira. Light and L devise a plan to contact Reiji Namikawa, who agrees to act as a spy and delay killings by discussing them during meetings. L plays mind games with Light, revealing continued suspicion that Light is the first Kira. Subsequently, L questions Misa and requests her infiltration of the Yotsuba Group to gather information. Soichiro expresses concern that capturing all members simultaneously will be difficult even if sufficient information is obtained through these methods.
Episodes
- Ep. 16 · Light surrenders the Death Note to L to clear his name as Kira.
- Ep. 17 · L and Soichiro stage a fake execution to test Light and Misa for Kira.
- Ep. 18 · L proposes binding to Light, sparking conflict as Kira shifts to monetary motives and targets Yotsuba Group.
- Ep. 19 · Matsuda investigates Yotsuba Group while posing as Misa's manager to contact L.
- Ep. 20 · Investigation team uses surveillance to monitor Yotsuba Group while L suspects Light.
- Ep. 21 · Misa meets Rem and identifies Higuchi as the third Kira while L grows suspicious.
- Ep. 22 · L directs police to delay Higuchi's arrest while orchestrating a media trap to expose the third Kira.
- Ep. 23 · Higuchi Discusses His Predicament With Rem While Driving To Sakura TV
- Ep. 24 · L discovers shinigami exist after arresting Higuchi, who is suspected of being Kira in Kanto.