Lane appeared as Lockhart Gardner's court-appointed trustee in season 4 when the firm declared their bankruptcy. His character has formed a mentor-student relationship with Matt Czuhry's Cary. When we see Holden in season 5, we can probably expect for that great character dynamics between the two to be revisited.
Expect for Holden to appear in episode 7 this season.
Also included on the season 5 lineup of returning guest stars are: Stockhard Channing, Dreama Walker and John Benjamin Hickey. The Office alum Zach Woods will also guest star.
Source: TV Guide