Historical clue formulations

• Sarah who hosted the podcast "Serial" — 2018-09-14
• "Serial" podcast host Sarah — 2018-02-10
• Walter of "Star Trek" — 2010-04-25
• Chekov player on "Star Trek" — 2006-07-18
• Chekov player on "Star Trek" — 2001-08-15
• Original "Star Trek" actor — 1997-10-11
• "Star Trek" regular Walter — 1997-08-22