LEGO® Minifigures™ Series 5 were introduced on August 22nd, 2011. Collection includes: Fitness Instructor, Snowboarder Guy, Lizard Man, Lumberjack, Gladiator, Small Clown, Egyptian Queen, Evil Dwarf, Boxer, Ice Fisherman, Zoo Keeper, Graduate, Royal Guard, Cave Woman, Detective, and Gangster.
The idea behind collectable Minifigures™ was that each minifigure come in a sealed bag, so you never knew which minifigure you might get. You can reed more details on Series 1, Series 2, Series 3 and Series 4.
Detailed information can be found on LEGO® website here.
Although released in 2011, not available any more You can still try to find them on eBay.
Some more information on this series can be found on Brickipedia.
Below you can find photos of all Minifigures in this collection:
