Penny and Howard have very different problems in a new sneak peek from The Big Bang Theory season 7, episode 15.

A new sneak peek has been released from The Big Bang Theory season 7, episode 15, which shows the geeky gang getting ready to celebrate Valentine’s Day. The episode, titled “The Locomotive Manipulation,” will focus on the fallout of Sheldon and Amy’s not-quite-romantic experience on a train ride.

In the clip, which was released on E!Online, the gang discusses their plans for the most romantic (and stressful) day of the year. Bernadette, Howard, Amy, and Sheldon have plans to go on a train ride through Napa Valley, while Leonard and Penny are planning to stay at home and relax.

Related: The Big Bang Theory season 7 news: All aboard the love train

Leonard intimates that taking Penny through the wine country would be an error in judgement, as she may have a drinking problem. (Way to kick off Valentine’s Day, Dr. Hofstadter.) Sheldon is then embarrassed for Howard when he learns that Howard has no pocket watch to wear aboard the train.

Seriously, people these days!

The promo and stills for The Big Bang Theory season 7, episode 15 show that Sheldon and Amy’s plans for romance may actually be successful… though not quite in the way Amy intends. Meanwhile, the official synopsis for “The Locomotive Manipulation” offers a hint at what the perpetually unlucky-in-love Raj will be up to on Valentine’s Day.

Love is in the air when Sheldon and Amy join Howard and Bernadette for a trip to wine country. Meanwhile, Leonard and Penny must rush Raj’s dog to the vet.

Yes, it seems like Raj’s dog Cinnamon may be having the worst Valentine’s Day of all. Let’s hope the pup gets better – what on earth would Raj do without her?

The Big Bang Theory season 7, episode 15, “The Locomotive Manipulation,” will air tomorrow night at 8:00 p.m. on CBS.

Do you think things will chug along smoothly on ‘The Big Bang Theory’?