I asked IFC for more info about Hamm's character -- specifically if he is the "clandestine mastermind" mentioned below. The answer: "We're actually keeping his character info under wraps for now as it is a key point in the plot line."
The official word: IFC announced today that Jon Hamm (Mad Men) will guest star in the second season of IFC’s original comedy series, The Increasingly Poor Decisions of Todd Margaret, which will premiere in January 2012. Hamm is featured along side stars David Cross and Will Arnett in five of the series’ six brand new half-hour episodes. Additionally, musician Johnny Marr returns to score and perform the series’ original music to compliment the existing original pieces he created for season one.
The Increasingly Poor Decisions of Todd Margaret is created, written by and stars David Cross (Arrested Development) as Todd Margaret, a corporate nobody and well-intentioned bloke who bluffs his way into a senior sales position heading up the London office for the new energy drink Thunder Muscle. The show also stars Will Arnett (Arrested Development) as Todd’s sniveling boss, Brent, Sharon Horgan (Pulling) as Alice, the unwilling object of Todd’s affection and Blake Harrison (The Inbetweeners) as Todd’s mysteriously devious singular employee, Dave.
Last season found Todd continuously discovering new outlandish layers of trouble for himself including instigating a biohazard emergency at a major grocery store, getting swindled out of his stock of Thunder Muscle by Turkish terrorists, and being arrested for breaking into Parliament in a misguided attempt to woo Alice. In the upcoming season, we come full circle to Todd’s court hearing and find out the identity of the clandestine mastermind of Todd’s misfortune.