Reception of last night's 'How I Met Your Mother' episode "The Time Travelers" might have been a bit mixed (we might have been the only ones still sour by the end), but that hasn't dampened our anticipation for the upcoming season finale episodes "Something Old" and "Something New" one bit. Whether or not we'll actually meet the mother as planned remains to be seen, but at least we have 'Happy Endings' star Casey Wilson and 'Key & Peele's Keegan-Michael Key to sweeten the deal! Find out all about the 'How I Met Your Mother' finale inside!

As per usual, 'How I Met Your Mother's upcoming season finale proves something of a mystery to us, even if last night's "The Time Travelers" claimed to be exactly 45 days away from meeting the titular character. How series creators Carter Bays and Craig Thomas plan to deviate into an additional season remains to be seen, but the appearances of 'SNL' alum Casey Wilson and comedian Keegan-Michael Key in the May 13 finale certainly has us primed.

According to Vulture, the pair will play a couple dining at the same restaurant as Barney and Robin, but whether or not they end up having any impact on the impending wedding remains to be seen. Several outlets even speculate that given her comic pedigree, Wilson could wind up playing the long-awaited mother herself, but there isn't any immediate base for that suggestion.

Well, what say you? Are you excited for this season's 'How I Met Your Mother' season finale, now that Casey Wilson and Keegan-Michael Key are on board? Check out a highlight from last night's episode below, and give us your predictions for the May 13 'How I Met Your Mother' finale in the comments!

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