On August 20, 2009, Warehouse 13 was renewed for a second season, on March 2, 2010, it was revealed that the second season would consist of 12 episodes and start airing on July 6, 2010. Jewel Staite had a guest role in the second season opposite Sean Maher. Season two also marked the first crossover event with fellow Syfy series Eureka. Douglas Fargo from Eureka appeared in the August 3, 2010 episode of Warehouse 13, with Claudia Donovan appearing on Eureka on August 6, 2010.

Season summary

Episode list

Image	Title	Writer(s)	Director(s)	Airdate	#
	Time Will Tell	Writer: Jack Kenny	Director: Stephen Surjik	July 6, 2010	#1
	MacPherson frees H. G. Wells and escapes the Warehouse with the aid of Leena. The agents try to track down MacPherson and Wells again.
	Mild Mannered	Writer: Benjamin Raab & Deric A. Hughes	Director: Constantine Makris	July 13, 2010	#2
	When a masked vigilante dispenses superhero-style justice in Detroit, Myka and Pete search for the artifact responsible. Claudia and Leena sort out their animosity while installing motion detectors throughout the Warehouse, and Artie tries to figure out how and why he's apparently being haunted by MacPherson.
	Beyond Our Control	Writer: David Simkins	Director: Constantine Makris	July 20, 2010	#3
	Pete, Myka, Artie and Claudia investigate a series of seemingly random appearances of men from different historical periods occurring in Univille. Meanwhile, Irene Frederic and the Regents help Leena overcome the mental and physical consequences of MacPherson's possession.
	Age Before Beauty	Writer: Daniel Kreisberg	Director: Tawnia McKiernan	July 27, 2010	#4
	The team investigates the death of a Russian model who rapidly aged. They head for New York City to go to a model show where Pete Lattimer witnesses another model rapidly age. Meanwhile Claudia goes on a date with Todd which doesn't end well.
	13.1	Writer: Jack Kenny & David Simkins	Director: Ken Girotti	August 3, 2010	#5
	Dr. Douglas Fargo a scientist employed by Global Dynamics located in Eureka, Oregon travels to Warehouse 13 to update its computer system. During the process a computer virus is triggered that causes a lockdown of the Warehouse, trapping everyone inside.
	Around The Bend	Writer: Bob Goodman	Director: Tawnia McKiernan	August 10, 2010	#6
	Pete has a secret assignment, and runs into a former flame, which may result in him betraying the team.
	For The Team	Writer: Drew Z. Greenberg	Director: Tawnia McKiernan	August 17, 2010	#7
	Myka teams up with a new partner to investigate into combustible college wrestlers.
	Merge With Caution	Writer: Nell Scovell	Director: Anton Cropper	August 24, 2010	#8
	Pete and Myka's bodies are swapped because of an artifact. Soon after, they find out that the swap is deadly. In the meantime, Claudia and Artie investigate into a seduction artifact to which Artie falls prey.
	Vendetta	Writer: Michael P. Fox	Director: Matt Earl Beesley	August 31, 2010	#9
	Artie's past as a traitor returns to haunt him when someone uses artifacts to murder, and his former Russian handler is the prime suspect.
	Where and When	Writer: Drew Z. Greenberg & Andrew Kreisberg	Director: Stephen Cragg	September 7, 2010	#10
	The group must use Helena's time machine to travel to 1961 to solve a case.
	Buried	Writer: Robyn Adams & Mike Johnson	Director: Stephen Surjik	September 14, 2010	#11
	When Mrs. Frederic starts speaking a dead language, the team discovers that the remnants of Warehouse 2 have been discovered during an archeological dig in Egypt.
	Reset	Writer: Jack Kenny & Nell Scovell	Director: Constantine Makris	September 21, 2010	#12
	The team tries to track down their rogue member, and discover the artifact they have is unexpectedly powerful. Meanwhile, Claudia wonders about her future with the Warehouse team and Pete must choose between Kelly and the mission.
	Secret Santa	Writer: Bob Goodman	Director: Jack Kenny	December 7, 2010	#13
	Pete and Myka have to track down a bad Santa while the rest of the team celebrates the holidays.