It's a fresh whodunit--times three--this week.

On Monday at 10:00pm ET/PT, CSI: Miami starts out the week with "Tunnel Vision", which opens with a crash:

A body in a sinkhole leads the team to a robbery whose target holds a shocking secret.

This is the fifteenth time Karen Gaviola has directed for Miami. Her most recent turn in the director's chair was for "Bang, Bang, Your Debt" earlier this season. This is the first time Tamara Jaron is listed as a writer for the show.

The following actors and actresses are guest-starring in "Tunnel Vision":

• Boti Bliss as Maxine Valera
• John Schneider as Charles Brighton
• Kaitlin Doubleday as Amanda Brighton
• Nicole Randall as Lori Stoltz
• Lamont Johnson as Keith Farrell
• Michael DeLorenzo as Carlos Santiago
• Edi Gathegi as Freddie Mays
• Matt Bushell as Dan Kirkland
• Tom Virtue as Richard Cyrus
• Antal Kalik as Jeff Gibson
• Tom Hines as Steve

Boti Bliss is reprising her established role as Maxine Valera. Nicole Randall appeared in "Hurricane Anthony" as a different character, and she also had an uncredited role in the CSI: Crime Scene Investigation episode "Strip Strangler". Michael DeLorenzo was in the CSI: New York episode "Cool Hunter". Matt Bushell also appeared on New York, guest-starring in the season one episode "Rain". Tom Virtue appeared in the CSI episode "Random Acts of Violence".

CSI: New York goes back to school on Wednesday at 10:00pm ET/PT with "Admissions":

The CSI team investigates the mysterious death of a handsome guidance counselor, and the "Taxi Cab Killer" continues to wreak havoc on the city.

Rob Bailey has directed 18 previous episodes of New York, the latest being "Right Next Door". This is the thirteenth CSI: NY episode written by Zachary Reiter, who also wrote the season four premiere, "Can You Hear Me Now?"

"Admissions" features the following actors and actresses in guest-starring roles:

• Robert Joy as Dr. Sid Hammerback
• Carmen Argenziano as Inspector Gerrard
• Paul Hodge as Jesse/Hank
• Paul Keeley as Robert Greggs
• Kelen Coleman as Natalie Gerrard
• Monica Herman as Laura Davis
• Todd Julian as Jason Francis
• Emily Happe as Sarah Bell
• Zack Hopkins as Blake Marshall
• Kelly Heaton as Amanda
• Daniel Samonas as Clark Robertson
• Gideon Emery as Christopher Vackner
• Arye Gross as Wallace/Frank

Robert Joy and Carmen Argenziano are reprising established recurring roles. Monica Herman appeared in the Miami episode "Throwing Heat". Arye Gross was in the CSI episode "Feeling the Heat". The rest of the guest-stars are appearing in the franchise for the first time.

Things get mysterious in "The Theory of Everything", this Thursday at 9:00pm ET/PT on CSI: Crime Scene Investigation:

Grissom and his team discover several victims who have green blood, leading them to the conclusion that their deaths are somehow connected.

This is the second time Chris Leitch has directed CSI, the other time being for "Fallen Idols" in season seven. Executive producer Carol Mendelsohn has 43 writing credits for CSI (the latest being "Grissom's Divine Comedy"). She co-wrote the story for this episode with David Rambo, who has 14 writing credits (including "Bull" from earlier this season). Rambo co-wrote the teleplay for "The Theory of Everything" with Douglas Petrie, who has five previous writing credits for this series, including this season's "You Kill Me".

The following guest-stars will appear in "The Theory of Everything":

• David Berman as David Phillips
• Archie Kao as Archie Johnson
• Liz Vassey as Wendy Simms
• Sheeri Rappaport as Mandy Webster
• Jon Wellner as Henry Andrews
• Larry Mitchell as Officer Mitchell
• Colin Kim as Office Choi
• Chloe Webb as Evelyn Polychronopolous
• Karl Makinen as Kyle Planck
• Sam Witwer as Officer Casella
• Jose Pablo Cantillo as I.A. Officer Galvez
• Christine Lakin as Margo Delphi
• Joe Howard as Logan Martin
• Don Swayze as Dave Bohr
• Jeremy Cohenour as Cell Phone Dude

David Berman, Archie Kao, Liz Vassey, Sheeri Rappaport and Jon Wellner are reprising established roles. This is Larry Mitchell's twenty-seventh episode as Officer Mitchell, who was last seen in "Drops' Out". Colin Kim appeared in two previous episodes as Officer Choi, the latest being "Bull". Sam Witwer is returning as Officer Casella after first portraying the character in "Go to Hell". Karl Makinen appeared in the Miami episode "Rampage". Christine Lakin also guest-starred on Miami for an uncredited role in "Death Pool 100". Don Swayze was in the Miami episode "Nothing to Lose".

"Tunnel Vision", "Admissions" and "The Theory of Everything" begin airing April 28 on CBS.

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