January
4 – Supernatural repeats start airing on TNT.
6 – The Annual People's Choice Awards 2010; Gabriel Tigerman's The Bannen Way (webseries).
8 – Genevieve Cortese's Birthday.
12 – Supernatural Magazine #14 release date.
17 – McG's Human Target premiere (FOX).
18 – Austin Basis' Life UneXpected premiere (The CW).
20 – Supernatural: Beginning's End #1release date.
22 – Adrianne Palicki's Legion release date (USA).
25 (-31) – A.J. Buckley's Skateland at the 2010 Sundance Film Festival, Park City, Utah, USA.
26 – Mark Rolston's Saw VI DVD and Blu-ray release date (USA).
– Gabriel Tigerman's The Bannen Way (webseries. No exact date yet) January 6.
February
3 – Fredric Lehne's Birthday.
9 – Sterling K. Brown's Army Wives Third Season DVD release date (USA).
12 – Gabriel Tigerman'sThe Bannen Way screening at the Egyptian Theatre; Jake Abel's Percy Jackson & the Olympians: The Lightning Thief premiere date (USA).
15 – Special 10-hour Supernatural marathon (TNT).
16 – Supernatural: Heart of the Dragon release date; The CW has picked Supernatural for a sixth season; Adrianne Palicki's Women in Trouble DVD and Blu-ray release date (USA).
17 – Supernatural: Beginning's End #2 release date.
23 – Genevieve Cortese's Flash Forward Season 1 Part 1 DVD release date (USA); Supernatural Magazine #15 release date.
March
1 – Jensen Ackles' Birthday.
10 – Katharine Isabelle's Birthday.
14 – Adrianne Palicki and Traci Dinwiddie's Elekra Luxx at 2010 SXSW Film Festival, Austin, Texas, USA (World Premiere).
16 – A.J. Buckley's Skateland at 2010 SXSW Film Festival, Austin, Texas, USA.
17 – Supernatural: Beginning's End #3 release date.19-21 – Insurgence, Birmingham, UK. September 2010.
23 – Julie McNiven's Mad Men – Season 3 DVD and Blu-ray release date (USA).
26-28 – Salute to Supernatural, Los Angeles, California, USA.
29 – End of Season 5 shooting.
April
2-4 – Jus In Bello, Rome, Italy; WonderCon 2010, San Francisco, California, USA.
6 – Robert Wisdom's The Collector DVD release date (USA); Supernatural Magazine #16 release date.
9 – Jeffrey Dean Morgan's The Losers release date (USA). New date: June 4 April 23; Adrianne Palicki and Traci Dinwiddie's Elekra Luxx at the 15th Anniversary Gen Art Film Festival, New York, New York, USA.
11 – The 31st Annual Young Artist Awards.
15 – Supernatural 100th Episode; Ghostfacers premiere (cwtv.com).
16 – Katie Cassidy's A Nightmare on Elm Street release date (USA); (New date: April 30); Jeffrey Dean Morgan's The Losers release date (USA). New date: April 9.
20 – Supernatural: The Unholy Cause (formerly known as Supernatural: Dark History) release date.
21 – Supernatural: Beginning's End #4 release date.
22 – Jeffrey Dean Morgan's Birthday.
23 – Jeffrey Dean Morgan's The Losers release date (USA).
28 – Robert Wisdom's Happy Town premiere date (ABC).
30 (- May 2) – Supernatural Argentina Convention, Buenos Aires, Argentina; (30) Katie Cassidy's A Nightmare on Elm Street release date (USA).
May
6 – Adrianne Palicki's Birthday.8-9 – Supernatural convention, São Paulo, Brazil.8-9 – All Hell Breaks Loose II, Sydney and Melbourne, Australia.
13 – Season Five finale.
14-16 – Asylum 4, Houses of the Holy, Birmingham, UK.
18 – Katherine Isabelle's Hard Ride To Hell DVD release date (USA).
19 – Supernatural: Beginning's End #5 release date.
21-23 – Asylum Europe, No Rest for the Wicked.
25 – Aldis Hodge's Leverage: The Complete Second Season DVD release date (USA).
26 – Nicki Aycox's Birthday.
28-30 – Asylum 4, Birmingham, UK. May 14-16; Heaven in Hell, Issy Les Moulineaux, France.
– Alona Tal's Kalamity release date (no exact date).
June
1 – Supernatural : War of the Sons release date; Katharine Isabelle and Brendan Fletcher's Rampage DVD released date (USA).4 – Jeffrey Dean Morgan's The Losers release date (USA). New date: April 23.
11 – Alona Tal's Kalamity at the Village East Theater, New York City, New York, USA.
12-13 – Rising Con, Barcelona, Spain.
15 – Supernatural: The Complete First Season Blu-ray release date (USA); Nicki Aycox's Animals DVD release date (USA).
16 – Supernatural: Beginning's End #6 release date.
– Misha Collins' Stonehenge Apocalypse (Syfy).
July
9-11 – Salute to Supernatural, Parsippany, New Jersey, USA.
16-18 – Polaris 24, Richmond Hill, Ontario, Canada.
19 – Jared Padalecki's Birthday.
27 – Supernatural: The Official Companion Season 4 release date.
August
1 – Charles Malik Whitfield's Birthday.
12 – Jim Beaver's Birthday.
27-29 – Salute to Supernatural, Vancouver, British Columbia, Canada.
September
3-5 – Roadhouse, Birmingham, UK; (-6) Dragon*Con 2010, Atlanta, Georgia, USA.
10-12 – Insurgence, Birmingham, UK.
14 – Robert Wisdom's Birthday.
21 – Supernatural: The Official Companion Season 5 release date.
24 – Adrianne Palicki's Red Dawn release date (USA). New date: November 24; Season 6 premiere.
– Insurgence, Birmingham, UK. September 10-12.
October
8-10 – Salute to Supernatural, Chicago area (Illinois, USA).
20 – Alona Tal's Birthday.
29-31 – Asylum 5, Feast of the Dead, UK.
November
1 – Chad Lindberg's Birthday.
2 – Samantha Ferris' Birthday.
4 – Samantha Smith's Birthday.
24 – Jeffrey Dean Morgan and Adrianne Palicki's Red Dawn release date (USA).
25 – Katie Cassidy's Birthday.
December
9 – Sebastian Spence's Birthday.