At least 14 appearances since the beginning of 2008, 50 if you count every episode of every series separately.
2008 -
Sleepwalking - Will
(age: 47/48)
2008 -
Battlestar Galactica (Season Four: First Half; 6 episodes:
Six of One,
The Road Less Traveled,
Faith,
Guess What's Coming to Dinner,
The Hub (credited only),
Revelations) - Leoben Conoy
(age: 47/48)
Six of One:
The Road Less Traveled:
Faith
Guess What's Coming to Dinner:
Revelations:
2008 -
The X Files: I Want To Believe - Janke Dacyshyn
(age: 47/48)
2008 -
Murder On Her Mind a.k.a. Of Murder and Memory a.k.a. Who Named the Knife - Leonhard
(age: 47/48)
2008 -
Californication (Season Two, 12 episodes:
Slip of the Tongue,
The Great Ashby,
No Way to Treat a Lady,
The Raw & the Cooked,
Vaginatown,
Coke Dick & First Kick,
In a Lonely Place,
Going Down and Out in Beverly Hills,
La Ronde,
In Utero,
Blues from Laurel Canyon,
La Petite Mort) - Lew Ashby
(age: 47/48)
The Great Ashby:
No Way to Treat a Lady:
The Raw & the Cooked
In a Lonely Place
Going Down and Out in Beverly Hills
La Ronde
In Utero
Blues from Laurel Canyon
2009 -
Battlestar Galactica (Season Four: Second Half; 3 episodes:
Sometimes a Great Notion,
Blood on the Scales,
Daybreak: Part 2) - Leoben Conoy
(age: 48)
Sometimes a Great Notion:
Blood on the Scales:
Daybreak: Part 2
2009 -
Harper's Globe (2 episodes,
There Is Only One Way Out on Harper's Island,
Surviving Harper's Island (not yet credited on IMDB)) - John Wakefield
(age: 48)
2009 -
Harper's Island (4 episodes,
Snap,
Splash,
Sigh,
Gasp) - John Wakefield
(age: 48)
Splash
Sigh
Gasp
2009 -
Battlestar Galactica: The Plan (DVD premiere October 2009) - Leoben Conoy
(age: 48)
2009 -
Shattered - Kyle Loggins
(age: 48/49)
The pilot was shot in November 2008, the series got green-lit for 13 one-hour episodes in April (airdate 2009/2010). Shooting should begin about now.
The first picture is a production still, the second one is taken from the preview website of production company.
2009 -
Gunless (release date March 2010) - Ben Cutler
(age: 48)
no pictures available
2009 - Halo (not yet at IMDB. The movie was shot in April 2009 and will debut on the festival circuit in the Fall of 2009, to be followed by a general release in theatres in 2010.) - Donald McMullen
(age: 48)
The picture is a production still (found by
neu111).
2009 -
24 (not yet credited at IMDB, but his participation has been confirmed in a recent interview, 3 episodes, filmed about a month ago) - no character name yet, but apparently he's playing a Russian mobster, ETA: Vladimir Laitanan
(age: 48)
No pictures available
Some of the screencaps are taken from
scriggle, and a few of the BSG ones are stolen from the girls at the
Callum Keith Rennie appreciation thread at the SyFy forums. (Let me know in case that's not okay?)
This is Part Five of the filmography, the other parts are here:
One,
Two,
Three,
Four.