Hey, It's That Guy!:
Obviously, Tim Roth. Watching or Reservoir Dogs on the same day as watching an episode of Rosencrantz and Guildenstern Are Dead Lie to Me can be kind of uncanny.
Gillian is Lindsay Dole.
Andy Goode is still alive and calling himself Eli Loker.
Or maybe Tyler Ford has gone on a deep-cover mission for Fatboy Inc.
Cal sometimes compares the facial expressions of suspects or other people to the expression of celebrities, like George W. Bush, Simon Cowell, and Barack Obama.
In "Moral Waiver", a rape suspect is Adam from (or Sark from Heroes , if you prefer).
Alias Daniel Sunjata of fame appears in the penultimate episode of season one as the Rescue Me nemesis of Cal.
There's three actors who are Jossverse villains in the 8th episode of season 1. Spotted were Knox, Rance Burgess and Jubal Early.
Spike appeared in the second season and seems to have joined Wolfram and Hart and started working as a prosecutor. That is until he died. Again.
Rene, the psychotic, fangbanger-hatin' serial killer makes an appearance in "The Core of It" as Caroline Wakefield's brother.
Cal's ex-wife once got soaking wet in a nightclub.
For others she's recognizable as Bette.
It appears Logan Echolls has stepped up from "obligatory psychotic jackass" to "serial killer".
Victor and his wife Jo Harvelle/ Meg Manning needed Lightman's help with Victor's PTSD in "React to Contact".
Mrs. Evans / Nan Flanagan as the head of a juvie facility and blackmailing ringleader of a robbery crew in "Delinquent".
"Pied Piper" features half the cast of The Shield.
Gillian dated Mack Gerhardt.
Jimmy Barrett has moved from bad comedy to adult entertainment.
Tobias Beecher is Steven Cook in "Black and White".
Cyd/Codex / Penny is now a primary school teacher by "Tractor Man".
Jordan Todd tried to pick up Cal in a bar in "Honey".
Number Six is an art thief who gets up-close-and-personal with Cal in "Double Blind".
Martha Kent has early-onset Alzheimer's in "Veronica", and Bobby Singer is her brother-in-law.
Burt is a man trying to clear his name of the murder of his wife in one episode.
Admiral Fitzwallace is the dying father of a murder victim in "Smoked", although he might be better known for playing James Evans on Good Times.
Monica Reyes plays a paramedic Angel of Death in "Saved".
And Eugene Victor Tooms shows up one episode later in "Gone Baby Gone" playing an alcoholic cop and father of a missing baby.
"Killer App" has Thom as a Mark Zuckerberg expy.
Ben Reynolds switched to the CIA, then joined Torchwood.