Marathon set

The surviving members of the Grateful Dead are present and accounted for in the Martin Scorsese-produced documentary “Long Strange Trip,” but with a running time of four hours, you’d think there would be commentary from Bob Dylan or, at least, John Mayer. No dice. Instead, the tale is largely left up to roadies and managers, not exactly star-studded company for such a challenging haul. Among the few celebrities: Al Franken, whose affection for “Althea” may be used against him in any presidential run.

Now streaming on Amazon Prime

Dust in the wind

The “CSI” labs on CBS may be collecting cobwebs, but viewers’ fascination with forensic investigation continues. That’s the theory behind the launch of “Beyond Reasonable Doubt,” a new true-crime series told through the eyes of investigators who tackle headline-making cases.

8 p.m. Friday, HLN

New kid on the block

All eyes will be on NBC’s newly acquired heavyweight with the launch of “Sunday Night With Megyn Kelly,” a test drive before she enters the competitive circuit of morning news. Not that this newsmagazine won’t have its own challenges. It goes head to head against “60 Minutes,” although that institution relies heavily on repeats during the summer.

6 p.m. Sunday, KARE, Ch. 11

The Chicago way

“Andrew Santino: Home-Field Advantage” finds the rising stand-up star exploring well-worn territory as he returns to his Chi-town roots. But Santino is someone to watch, perhaps more as an actor than a comedian. His performance as an ambitious, insanely jealous 1970s comedian is just one reason Showtime’s “I’m Dying Up Here” is one of 2017’s most compelling new dramas. For more on that series, see Sunday’s Variety section.

8 p.m. Friday, Showtime

Neal Justin