Tom Cruise was back on the set of Oblivion in Mammoth Lakes, CA, yesterday. He's been hard at work on the film since settling his divorce from Katie Holmes this Monday. It looks like he's been in good spirits despite the family drama and was even seen smiling and laughing with colleagues in recent days. Tom got another boost during production when his son, Connor, stopped by to visit him between takes. Katie Holmes, meanwhile, has had her mom, Kathleen, and Suri by her side on the East Coast. Katie, Kathleen, and Suri stopped by the Central Park Zoo just yesterday and were likewise looking happy as they checked out the animals.