John Lithgow to Guest Star on HOW I MET YOUR MOTHER

DEXTER (Season 4)

Warning: Major Spoilers Ahead!

Alright, well you can’t say that I didn’t warn you. What you’ve got to decide now is whether or not you really want to keep reading. Because I’m about to reveal something really big here about one of the most enduring mysteries on HOW I MET YOUR MOTHER.

You sure you want to read on?

Okay then, here we go. According to, HIMYM has cast John Lithgow to play… Barney’s father!!

Yep, you read that right. It’s been confirmed that the Dexter Emmy winner is nearing a deal to play Neil Patrick Harris’ onscreen dad, Jerome Whitaker, in one episode later this season. Much mystery has surrounded Barney’s MIA pop during much of the show’s run and poor Barney has even been fooled by the occasional red herring, including everyone from Bob Barker to Ben Vereen (a. k. a. his half-brother’s dad, Sam).

While it’s not clear yet exactly when Barney will meet his long lost daddy, one thing you can count on is that the reunion is bound to be.. wait for it… epic.

Oh now stop your groaning. Seriously, how could I possibly resist that??

Follow me on Twitter @mokibobolink