Robert Carlyle as Francis Begbie in "T2 Trainspotting." (L-R) Ewan McGregor as Mark Renton and Jonny Lee Miller as Simon in "T2 Trainspotting." (L-R) Ewan McGregor as Mark Renton and Jonny Lee ...

ET exclusively debuts a first look from the series' final episode with Jonny Lee Miller and Lucy Liu. The final episode of CBS' long-running detective drama airs Thursday, Aug. 15 at 10 p.m. ET/PT ...