Alex Grainger was the Leader of Cardiff City Council and the co-ordinator for emergency protocols in the event of any natural or man-made disaster in the area.

Death: He was stabbed to death by David in his own hallway.

Sean Carlsen is one of the actors who have crossed over from Doctor Who to Torchwood.

Torchwood

Sleeper (2008).... Mr. Grainger

Before Torchwood

"Doctor Who" .... Policeman (1 episode, 2005)
The Great Dome Robbery (2002) .... Kevin Meredith
"The Bench" .... Chris Jones (1 episode)
"Tastebuddies" (2000) TV series .... Sean Bowen
"Casualty" .... Bard / ... (2 episodes, 1993-1998)
"Tiger Bay" .... PC Owen (1 episode, 1997)
Back-Up (1997) .... Hooley
Shine (1996) .... Student
Bad Company (1992) .... Lee Taylor