S01E18: Ally
Though L is still suspicious, Light and Misa, their memories of being Kira wiped clean, return to headquarters, where Light notices a strange connection between the recent Kira killings and the Yotsuba Group.
Previous Episode 
Season 1
Rebirth
S1E1 / 04 Oct 2006
Confrontation
S1E2 / 11 Oct 2006
Dealings
S1E3 / 18 Oct 2006
Pursuit
S1E4 / 25 Oct 2006
Tactics
S1E5 / 01 Nov 2006
Unraveling
S1E6 / 08 Nov 2006
Overcast
S1E7 / 15 Nov 2006
Glare
S1E8 / 22 Nov 2006
Encounter
S1E9 / 29 Nov 2006
Doubt
S1E10 / 06 Dec 2006
Assault
S1E11 / 13 Dec 2006
Love
S1E12 / 27 Dec 2006
Confession
S1E13 / 10 Jan 2007
Friend
S1E14 / 17 Jan 2007
Wager
S1E15 / 24 Jan 2007
Decision
S1E16 / 31 Jan 2007
Execution
S1E17 / 07 Feb 2007
Ally
S1E18 / 14 Feb 2007
Matsuda
S1E19 / 21 Feb 2007
Makeshift
S1E20 / 28 Feb 2007
Performance
S1E21 / 07 Mar 2007
Guidance
S1E22 / 14 Mar 2007
Frenzy
S1E23 / 21 Mar 2007
Revival
S1E24 / 28 Mar 2007
Silence
S1E25 / 04 Apr 2007
Renewal
S1E26 / 11 Apr 2007
Abduction
S1E27 / 18 Apr 2007
Impatience
S1E28 / 25 Apr 2007
Father
S1E29 / 02 May 2007
Justice
S1E30 / 09 May 2007
Transfer
S1E31 / 16 May 2007
Selection
S1E32 / 23 May 2007
Scorn
S1E33 / 30 May 2007
Vigilance
S1E34 / 06 Jun 2007
Malice
S1E35 / 13 Jun 2007
1.28
S1E36 / 20 Jun 2007
New World
S1E37 / 27 Jun 2007
Mamoru Miyano
Light Yagami (voice)
Shido Nakamura
Ryuk (voice)
Aya Hirano
Misa Amane (voice)
Kappei Yamaguchi
L (voice)
Kimiko Saito
Rem (voice)
Naoya Uchida
Soichiro Yagami (voice)
Ryou Naitou
Touta Matsuda (voice)
